./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.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_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/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_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/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_51587dc1-5d28-4c42-8644-dd14f06baac3/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 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:55:50,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:55:50,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:55:50,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:55:50,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:55:50,479 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:55:50,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:55:50,483 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:55:50,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:55:50,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:55:50,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:55:50,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:55:50,488 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:55:50,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:55:50,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:55:50,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:55:50,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:55:50,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:55:50,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:55:50,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:55:50,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:55:50,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:55:50,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:55:50,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:55:50,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:55:50,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:55:50,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:55:50,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:55:50,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:55:50,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:55:50,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:55:50,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:55:50,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:55:50,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:55:50,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:55:50,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:55:50,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:55:50,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:55:50,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:55:50,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:55:50,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:55:50,512 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:55:50,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:55:50,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:55:50,534 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:55:50,534 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:55:50,535 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:55:50,535 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:55:50,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:55:50,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:55:50,536 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:55:50,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:55:50,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:55:50,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:55:50,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:55:50,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:55:50,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:55:50,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:55:50,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:55:50,538 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:55:50,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:55:50,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:55:50,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:55:50,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:55:50,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:55:50,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:55:50,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:55:50,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:55:50,540 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:55:50,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:55:50,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:55:50,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:55:50,540 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:55:50,540 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:55:50,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:55:50,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:55:50,541 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_51587dc1-5d28-4c42-8644-dd14f06baac3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c9c46abbea18888bba6501dfe6c704a11e8fe399c985999e1e07c66bb12b728 [2021-12-06 20:55:50,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:55:50,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:55:50,745 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:55:50,746 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:55:50,746 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:55:50,747 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2021-12-06 20:55:50,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/data/e838c3aea/448146a5a610476694e6d9493bd5bfec/FLAG17361f76d [2021-12-06 20:55:51,158 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:55:51,158 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i [2021-12-06 20:55:51,163 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/data/e838c3aea/448146a5a610476694e6d9493bd5bfec/FLAG17361f76d [2021-12-06 20:55:51,172 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/data/e838c3aea/448146a5a610476694e6d9493bd5bfec [2021-12-06 20:55:51,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:55:51,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:55:51,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:55:51,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:55:51,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:55:51,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25890a88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51, skipping insertion in model container [2021-12-06 20:55:51,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:55:51,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:55:51,315 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_51587dc1-5d28-4c42-8644-dd14f06baac3/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2021-12-06 20:55:51,331 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:55:51,337 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:55:51,347 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_51587dc1-5d28-4c42-8644-dd14f06baac3/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-1.i[832,845] [2021-12-06 20:55:51,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:55:51,366 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:55:51,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51 WrapperNode [2021-12-06 20:55:51,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:55:51,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:55:51,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:55:51,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:55:51,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,396 INFO L137 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2021-12-06 20:55:51,396 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:55:51,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:55:51,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:55:51,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:55:51,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:55:51,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:55:51,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:55:51,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:55:51,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (1/1) ... [2021-12-06 20:55:51,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:55:51,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:51,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:55:51,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:55:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:55:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:55:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 20:55:51,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:55:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:55:51,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:55:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:55:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:55:51,479 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:55:51,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 20:55:51,542 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:55:51,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:55:51,704 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:55:51,710 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:55:51,711 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-06 20:55:51,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:55:51 BoogieIcfgContainer [2021-12-06 20:55:51,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:55:51,714 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:55:51,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:55:51,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:55:51,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:55:51" (1/3) ... [2021-12-06 20:55:51,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260d56c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:55:51, skipping insertion in model container [2021-12-06 20:55:51,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:55:51" (2/3) ... [2021-12-06 20:55:51,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@260d56c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:55:51, skipping insertion in model container [2021-12-06 20:55:51,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:55:51" (3/3) ... [2021-12-06 20:55:51,721 INFO L111 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-1.i [2021-12-06 20:55:51,726 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:55:51,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 20:55:51,764 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:55:51,771 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 20:55:51,771 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 20:55:51,785 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:55:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 20:55:51,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:51,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:51,790 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:51,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1976888394, now seen corresponding path program 1 times [2021-12-06 20:55:51,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582677492] [2021-12-06 20:55:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:51,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:51,923 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 20:55:51,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:51,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582677492] [2021-12-06 20:55:51,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582677492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:51,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:51,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:55:51,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758933566] [2021-12-06 20:55:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:51,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:55:51,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:51,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:55:51,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:55:51,951 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:52,004 INFO L93 Difference]: Finished difference Result 110 states and 169 transitions. [2021-12-06 20:55:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:55:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 20:55:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:52,012 INFO L225 Difference]: With dead ends: 110 [2021-12-06 20:55:52,012 INFO L226 Difference]: Without dead ends: 65 [2021-12-06 20:55:52,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:55:52,017 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:52,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:55:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-06 20:55:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2021-12-06 20:55:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:55:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-12-06 20:55:52,047 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2021-12-06 20:55:52,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:52,047 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-12-06 20:55:52,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,047 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-12-06 20:55:52,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 20:55:52,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:52,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:52,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 20:55:52,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:52,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1321690828, now seen corresponding path program 1 times [2021-12-06 20:55:52,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:52,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120429705] [2021-12-06 20:55:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:52,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:52,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:52,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:52,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120429705] [2021-12-06 20:55:52,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120429705] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:52,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390966] [2021-12-06 20:55:52,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:52,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:52,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:52,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:52,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:55:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:52,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:55:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:52,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:55:52,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:52,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:52,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 20:55:52,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835501481] [2021-12-06 20:55:52,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:52,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 20:55:52,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:52,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 20:55:52,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:55:52,215 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:52,319 INFO L93 Difference]: Finished difference Result 181 states and 243 transitions. [2021-12-06 20:55:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:55:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 20:55:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:52,323 INFO L225 Difference]: With dead ends: 181 [2021-12-06 20:55:52,323 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 20:55:52,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 20:55:52,325 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:52,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 202 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:55:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 20:55:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 44. [2021-12-06 20:55:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 20:55:52,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2021-12-06 20:55:52,339 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 12 [2021-12-06 20:55:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:52,339 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2021-12-06 20:55:52,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,339 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2021-12-06 20:55:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 20:55:52,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:52,340 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:52,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:55:52,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:52,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash -202652846, now seen corresponding path program 2 times [2021-12-06 20:55:52,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:52,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095860929] [2021-12-06 20:55:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:52,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-06 20:55:52,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:52,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095860929] [2021-12-06 20:55:52,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095860929] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:52,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:52,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:55:52,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53824072] [2021-12-06 20:55:52,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:52,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:55:52,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:52,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:55:52,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:55:52,726 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:52,769 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2021-12-06 20:55:52,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:55:52,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 20:55:52,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:52,771 INFO L225 Difference]: With dead ends: 82 [2021-12-06 20:55:52,771 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 20:55:52,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:55:52,773 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:52,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 56 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:55:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 20:55:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-12-06 20:55:52,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2021-12-06 20:55:52,782 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 18 [2021-12-06 20:55:52,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:52,783 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2021-12-06 20:55:52,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2021-12-06 20:55:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 20:55:52,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:52,785 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 20:55:52,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 20:55:52,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:52,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:52,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1069304186, now seen corresponding path program 1 times [2021-12-06 20:55:52,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:52,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498069093] [2021-12-06 20:55:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:52,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 20:55:52,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:52,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498069093] [2021-12-06 20:55:52,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498069093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:52,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:52,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:55:52,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115002194] [2021-12-06 20:55:52,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:52,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:55:52,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:52,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:55:52,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:55:52,846 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:52,866 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2021-12-06 20:55:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:55:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-06 20:55:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:52,868 INFO L225 Difference]: With dead ends: 90 [2021-12-06 20:55:52,868 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 20:55:52,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:55:52,870 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:52,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:55:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 20:55:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2021-12-06 20:55:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2021-12-06 20:55:52,878 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2021-12-06 20:55:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:52,878 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2021-12-06 20:55:52,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2021-12-06 20:55:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 20:55:52,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:52,880 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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 20:55:52,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 20:55:52,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1327947132, now seen corresponding path program 1 times [2021-12-06 20:55:52,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:52,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532445962] [2021-12-06 20:55:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:52,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 20:55:52,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532445962] [2021-12-06 20:55:52,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532445962] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:52,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814827822] [2021-12-06 20:55:52,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:52,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:52,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:52,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:52,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:55:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:52,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:55:52,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:55:53,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 20:55:53,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814827822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:53,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:53,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-06 20:55:53,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206187049] [2021-12-06 20:55:53,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:53,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 20:55:53,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:53,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 20:55:53,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-06 20:55:53,115 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:53,229 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2021-12-06 20:55:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 20:55:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-06 20:55:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:53,230 INFO L225 Difference]: With dead ends: 187 [2021-12-06 20:55:53,230 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 20:55:53,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-12-06 20:55:53,232 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 173 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:53,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 176 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:55:53,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 20:55:53,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 72. [2021-12-06 20:55:53,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:53,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-12-06 20:55:53,240 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 33 [2021-12-06 20:55:53,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:53,240 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-12-06 20:55:53,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:53,241 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-12-06 20:55:53,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 20:55:53,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:53,242 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-12-06 20:55:53,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:55:53,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:53,444 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1439765920, now seen corresponding path program 1 times [2021-12-06 20:55:53,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:53,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071038470] [2021-12-06 20:55:53,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:53,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-06 20:55:53,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:53,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071038470] [2021-12-06 20:55:53,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071038470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:55:53,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:55:53,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:55:53,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275057084] [2021-12-06 20:55:53,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:55:53,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:55:53,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:55:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:55:53,612 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:53,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:53,624 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2021-12-06 20:55:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:55:53,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-12-06 20:55:53,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:53,625 INFO L225 Difference]: With dead ends: 94 [2021-12-06 20:55:53,625 INFO L226 Difference]: Without dead ends: 64 [2021-12-06 20:55:53,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 20:55:53,626 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:53,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 95 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:55:53,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-06 20:55:53,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-12-06 20:55:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2021-12-06 20:55:53,632 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2021-12-06 20:55:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:53,632 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2021-12-06 20:55:53,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2021-12-06 20:55:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 20:55:53,633 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:53,634 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:53,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 20:55:53,634 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:53,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1385301982, now seen corresponding path program 2 times [2021-12-06 20:55:53,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:53,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298384392] [2021-12-06 20:55:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:53,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:53,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:53,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298384392] [2021-12-06 20:55:53,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298384392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:53,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272551590] [2021-12-06 20:55:53,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:55:53,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:53,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:53,737 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:53,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:55:53,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:55:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:53,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 20:55:53,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:53,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:54,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272551590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:54,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:54,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 20:55:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741815732] [2021-12-06 20:55:54,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:54,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 20:55:54,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:54,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 20:55:54,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:55:54,042 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:54,222 INFO L93 Difference]: Finished difference Result 261 states and 332 transitions. [2021-12-06 20:55:54,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 20:55:54,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-12-06 20:55:54,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:54,225 INFO L225 Difference]: With dead ends: 261 [2021-12-06 20:55:54,225 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 20:55:54,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 20:55:54,227 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 268 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:54,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 187 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:55:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 20:55:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 88. [2021-12-06 20:55:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-12-06 20:55:54,244 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 54 [2021-12-06 20:55:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:54,244 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-12-06 20:55:54,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:54,244 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-12-06 20:55:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 20:55:54,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:54,247 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:54,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:55:54,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:54,447 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:54,448 INFO L85 PathProgramCache]: Analyzing trace with hash 359833914, now seen corresponding path program 3 times [2021-12-06 20:55:54,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:54,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872583737] [2021-12-06 20:55:54,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:54,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 20:55:54,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872583737] [2021-12-06 20:55:54,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872583737] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223639510] [2021-12-06 20:55:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:55:54,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:54,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:54,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:55:54,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 20:55:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:55:54,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-12-06 20:55:54,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-12-06 20:55:54,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223639510] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:54,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:54,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 5, 5] total 31 [2021-12-06 20:55:54,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265213929] [2021-12-06 20:55:54,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:54,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 20:55:54,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:54,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 20:55:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=603, Unknown=0, NotChecked=0, Total=930 [2021-12-06 20:55:54,923 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:55,193 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2021-12-06 20:55:55,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 20:55:55,194 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-06 20:55:55,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:55,196 INFO L225 Difference]: With dead ends: 314 [2021-12-06 20:55:55,196 INFO L226 Difference]: Without dead ends: 273 [2021-12-06 20:55:55,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 20:55:55,198 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 555 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:55,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 379 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:55:55,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-12-06 20:55:55,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 134. [2021-12-06 20:55:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 131 states have (on average 1.1297709923664123) internal successors, (148), 131 states have internal predecessors, (148), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 150 transitions. [2021-12-06 20:55:55,217 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 150 transitions. Word has length 78 [2021-12-06 20:55:55,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:55,217 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 150 transitions. [2021-12-06 20:55:55,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 150 transitions. [2021-12-06 20:55:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 20:55:55,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:55,220 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:55,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:55:55,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:55,422 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 140841668, now seen corresponding path program 4 times [2021-12-06 20:55:55,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:55,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636567010] [2021-12-06 20:55:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:55,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 20:55:55,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636567010] [2021-12-06 20:55:55,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636567010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:55,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582446526] [2021-12-06 20:55:55,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 20:55:55,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:55,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:55,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:55,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:55:55,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 20:55:55,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:55:55,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 20:55:55,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:55:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 20:55:56,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:55:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 20:55:56,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582446526] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:55:56,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 20:55:56,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-06 20:55:56,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673007458] [2021-12-06 20:55:56,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 20:55:56,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 20:55:56,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:55:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 20:55:56,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 20:55:56,511 INFO L87 Difference]: Start difference. First operand 134 states and 150 transitions. Second operand has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:56,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:55:56,974 INFO L93 Difference]: Finished difference Result 557 states and 709 transitions. [2021-12-06 20:55:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 20:55:56,975 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-12-06 20:55:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:55:56,978 INFO L225 Difference]: With dead ends: 557 [2021-12-06 20:55:56,978 INFO L226 Difference]: Without dead ends: 472 [2021-12-06 20:55:56,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 20:55:56,980 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 764 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:55:56,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 317 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:55:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-12-06 20:55:57,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 184. [2021-12-06 20:55:57,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 181 states have (on average 1.0939226519337018) internal successors, (198), 181 states have internal predecessors, (198), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 20:55:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2021-12-06 20:55:57,002 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 116 [2021-12-06 20:55:57,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:55:57,002 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2021-12-06 20:55:57,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.372549019607843) internal successors, (121), 51 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:55:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2021-12-06 20:55:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 20:55:57,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:55:57,006 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:55:57,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 20:55:57,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:57,207 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:55:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:55:57,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2022982902, now seen corresponding path program 5 times [2021-12-06 20:55:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:55:57,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881448479] [2021-12-06 20:55:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:55:57,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:55:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:55:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2451 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-06 20:55:57,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:55:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881448479] [2021-12-06 20:55:57,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881448479] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 20:55:57,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092556160] [2021-12-06 20:55:57,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 20:55:57,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:55:57,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:55:57,980 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:55:57,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_51587dc1-5d28-4c42-8644-dd14f06baac3/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process