./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU --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 afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:50:06,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:50:06,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:50:06,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:50:06,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:50:06,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:50:06,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:50:06,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:50:06,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:50:06,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:50:06,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:50:06,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:50:06,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:50:06,631 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:50:06,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:50:06,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:50:06,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:50:06,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:50:06,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:50:06,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:50:06,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:50:06,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:50:06,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:50:06,650 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:50:06,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:50:06,654 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:50:06,655 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:50:06,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:50:06,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:50:06,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:50:06,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:50:06,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:50:06,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:50:06,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:50:06,667 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:50:06,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:50:06,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:50:06,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:50:06,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:50:06,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:50:06,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:50:06,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 22:50:06,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:50:06,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:50:06,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:50:06,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:50:06,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:50:06,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:50:06,719 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:50:06,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:50:06,719 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:50:06,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:50:06,721 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:50:06,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:50:06,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:50:06,722 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:50:06,722 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:50:06,722 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:50:06,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:50:06,723 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:50:06,723 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:50:06,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:50:06,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:50:06,724 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:50:06,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:50:06,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:50:06,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:50:06,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:50:06,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:50:06,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:50:06,726 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:50:06,726 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:50:06,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:50:06,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:50:06,727 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_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 [2021-11-02 22:50:06,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:50:07,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:50:07,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:50:07,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:50:07,020 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:50:07,021 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-11-02 22:50:07,110 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/d1d2722fa/a1314a371b2f4b50b360731471661fd5/FLAG58c036e67 [2021-11-02 22:50:07,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:50:07,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-11-02 22:50:07,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/d1d2722fa/a1314a371b2f4b50b360731471661fd5/FLAG58c036e67 [2021-11-02 22:50:07,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/d1d2722fa/a1314a371b2f4b50b360731471661fd5 [2021-11-02 22:50:07,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:50:07,965 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:50:07,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:50:07,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:50:07,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:50:07,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:50:07" (1/1) ... [2021-11-02 22:50:07,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@776b43cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:07, skipping insertion in model container [2021-11-02 22:50:07,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:50:07" (1/1) ... [2021-11-02 22:50:07,991 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:50:08,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:50:08,198 WARN L228 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_79312361-6be6-4717-962b-b1bb6417b4ef/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2021-11-02 22:50:08,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:50:08,236 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:50:08,248 WARN L228 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_79312361-6be6-4717-962b-b1bb6417b4ef/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2021-11-02 22:50:08,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:50:08,277 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:50:08,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08 WrapperNode [2021-11-02 22:50:08,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:50:08,279 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:50:08,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:50:08,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:50:08,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,295 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:50:08,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:50:08,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:50:08,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:50:08,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,332 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:50:08,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:50:08,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:50:08,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:50:08,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (1/1) ... [2021-11-02 22:50:08,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:50:08,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:08,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:50:08,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:50:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:50:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:50:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:50:08,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:50:08,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:50:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:50:08,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:50:08,898 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:50:08,898 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:50:08,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:50:08 BoogieIcfgContainer [2021-11-02 22:50:08,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:50:08,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:50:08,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:50:08,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:50:08,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:50:07" (1/3) ... [2021-11-02 22:50:08,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d635c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:50:08, skipping insertion in model container [2021-11-02 22:50:08,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:50:08" (2/3) ... [2021-11-02 22:50:08,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d635c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:50:08, skipping insertion in model container [2021-11-02 22:50:08,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:50:08" (3/3) ... [2021-11-02 22:50:08,913 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2021-11-02 22:50:08,919 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:50:08,919 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:50:08,962 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:50:08,969 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 [2021-11-02 22:50:08,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:50:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:08,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:50:08,992 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:08,993 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:08,993 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:08,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-11-02 22:50:09,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:09,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829205514] [2021-11-02 22:50:09,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:09,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:09,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829205514] [2021-11-02 22:50:09,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829205514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:09,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:09,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:50:09,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545162194] [2021-11-02 22:50:09,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:50:09,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:50:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:50:09,256 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:09,293 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-11-02 22:50:09,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:50:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:50:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:09,304 INFO L225 Difference]: With dead ends: 83 [2021-11-02 22:50:09,304 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 22:50:09,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:50:09,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 22:50:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-02 22:50:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-02 22:50:09,347 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-11-02 22:50:09,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:09,347 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-02 22:50:09,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-02 22:50:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:50:09,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:09,350 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:09,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:50:09,350 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-11-02 22:50:09,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:09,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021508597] [2021-11-02 22:50:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:09,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:09,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021508597] [2021-11-02 22:50:09,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021508597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:09,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:09,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:50:09,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57102735] [2021-11-02 22:50:09,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:50:09,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:50:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:50:09,467 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:09,530 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-11-02 22:50:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:50:09,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:50:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:09,532 INFO L225 Difference]: With dead ends: 75 [2021-11-02 22:50:09,532 INFO L226 Difference]: Without dead ends: 41 [2021-11-02 22:50:09,533 INFO L786 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 [2021-11-02 22:50:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-02 22:50:09,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-11-02 22:50:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-02 22:50:09,541 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 27 [2021-11-02 22:50:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:09,542 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-02 22:50:09,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-02 22:50:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:50:09,544 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:09,544 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:09,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:50:09,545 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash 479992254, now seen corresponding path program 1 times [2021-11-02 22:50:09,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:09,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576431336] [2021-11-02 22:50:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:50:09,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:09,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576431336] [2021-11-02 22:50:09,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576431336] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:09,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:50:09,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:50:09,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271820036] [2021-11-02 22:50:09,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:50:09,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:09,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:50:09,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:09,679 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:09,838 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2021-11-02 22:50:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:50:09,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 22:50:09,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:09,840 INFO L225 Difference]: With dead ends: 91 [2021-11-02 22:50:09,841 INFO L226 Difference]: Without dead ends: 60 [2021-11-02 22:50:09,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:50:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-02 22:50:09,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2021-11-02 22:50:09,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-11-02 22:50:09,853 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 29 [2021-11-02 22:50:09,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:09,853 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-11-02 22:50:09,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:09,854 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-11-02 22:50:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:50:09,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:09,856 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:09,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:50:09,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash -509099182, now seen corresponding path program 1 times [2021-11-02 22:50:09,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:09,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386172803] [2021-11-02 22:50:09,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:50:09,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:09,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386172803] [2021-11-02 22:50:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386172803] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:09,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575826686] [2021-11-02 22:50:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:09,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:10,012 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:10,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:50:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:50:10,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:50:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575826686] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:10,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:10,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 22:50:10,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550167788] [2021-11-02 22:50:10,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:50:10,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:10,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:50:10,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:50:10,422 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:10,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:10,513 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2021-11-02 22:50:10,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:50:10,513 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 22:50:10,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:10,515 INFO L225 Difference]: With dead ends: 97 [2021-11-02 22:50:10,515 INFO L226 Difference]: Without dead ends: 53 [2021-11-02 22:50:10,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:50:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-02 22:50:10,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-11-02 22:50:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:10,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-11-02 22:50:10,536 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2021-11-02 22:50:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:10,537 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-11-02 22:50:10,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-11-02 22:50:10,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:50:10,542 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:10,542 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:10,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:10,756 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:10,757 INFO L85 PathProgramCache]: Analyzing trace with hash 290748660, now seen corresponding path program 2 times [2021-11-02 22:50:10,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:10,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748749918] [2021-11-02 22:50:10,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:10,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:50:10,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:10,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748749918] [2021-11-02 22:50:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748749918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:10,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144811541] [2021-11-02 22:50:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:50:10,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:10,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:10,899 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:10,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:50:11,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:50:11,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:50:11,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 22:50:11,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144811541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:11,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:11,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-02 22:50:11,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877931895] [2021-11-02 22:50:11,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:50:11,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:11,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:50:11,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:50:11,255 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:11,480 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-11-02 22:50:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:50:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 22:50:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:11,485 INFO L225 Difference]: With dead ends: 122 [2021-11-02 22:50:11,485 INFO L226 Difference]: Without dead ends: 82 [2021-11-02 22:50:11,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:50:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-02 22:50:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-11-02 22:50:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-02 22:50:11,500 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 51 [2021-11-02 22:50:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:11,500 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-02 22:50:11,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.0) internal successors, (77), 7 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-02 22:50:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:50:11,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:11,502 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:11,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-02 22:50:11,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:11,719 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:11,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:11,720 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 3 times [2021-11-02 22:50:11,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:11,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670864996] [2021-11-02 22:50:11,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:11,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:15,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670864996] [2021-11-02 22:50:15,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670864996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:15,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229482349] [2021-11-02 22:50:15,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:50:15,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:15,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:15,744 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:15,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:50:15,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 22:50:15,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:15,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-02 22:50:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:50:24,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229482349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:24,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:24,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 49] total 85 [2021-11-02 22:50:24,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766737283] [2021-11-02 22:50:24,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-02 22:50:24,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-02 22:50:24,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6897, Unknown=0, NotChecked=0, Total=7140 [2021-11-02 22:50:24,637 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 85 states, 85 states have (on average 1.5647058823529412) internal successors, (133), 85 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:31,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:31,444 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-11-02 22:50:31,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 22:50:31,445 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5647058823529412) internal successors, (133), 85 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-02 22:50:31,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:31,446 INFO L225 Difference]: With dead ends: 133 [2021-11-02 22:50:31,447 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 22:50:31,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 28 SyntacticMatches, 15 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2578 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=349, Invalid=9953, Unknown=0, NotChecked=0, Total=10302 [2021-11-02 22:50:31,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 22:50:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2021-11-02 22:50:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1612903225806452) internal successors, (144), 124 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2021-11-02 22:50:31,468 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 71 [2021-11-02 22:50:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:31,468 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2021-11-02 22:50:31,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5647058823529412) internal successors, (133), 85 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2021-11-02 22:50:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-02 22:50:31,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:31,471 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:31,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:31,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:31,687 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:31,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1767165226, now seen corresponding path program 4 times [2021-11-02 22:50:31,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:31,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195372997] [2021-11-02 22:50:31,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:31,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 22:50:31,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:31,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195372997] [2021-11-02 22:50:31,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195372997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:31,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135095162] [2021-11-02 22:50:31,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 22:50:31,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:31,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:31,820 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:31,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:50:32,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 22:50:32,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:50:32,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-02 22:50:32,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135095162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:32,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:32,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-02 22:50:32,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061136186] [2021-11-02 22:50:32,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:50:32,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:50:32,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:50:32,350 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:32,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:32,686 INFO L93 Difference]: Finished difference Result 248 states and 286 transitions. [2021-11-02 22:50:32,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:50:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-02 22:50:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:32,688 INFO L225 Difference]: With dead ends: 248 [2021-11-02 22:50:32,688 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 22:50:32,689 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:50:32,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 22:50:32,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-02 22:50:32,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1587301587301588) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:32,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-11-02 22:50:32,716 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 73 [2021-11-02 22:50:32,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:32,717 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-11-02 22:50:32,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:32,717 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-11-02 22:50:32,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-02 22:50:32,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:32,726 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:32,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:32,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:50:32,952 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:32,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:32,953 INFO L85 PathProgramCache]: Analyzing trace with hash 570637516, now seen corresponding path program 5 times [2021-11-02 22:50:32,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:32,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732377654] [2021-11-02 22:50:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:32,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:50:33,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:33,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732377654] [2021-11-02 22:50:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732377654] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:33,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779852650] [2021-11-02 22:50:33,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 22:50:33,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:33,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:33,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:33,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:50:33,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 22:50:33,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:50:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-02 22:50:33,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779852650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:33,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:33,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-11-02 22:50:33,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686344851] [2021-11-02 22:50:33,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:50:33,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:33,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:50:33,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:50:33,740 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:34,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:34,065 INFO L93 Difference]: Finished difference Result 209 states and 245 transitions. [2021-11-02 22:50:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:50:34,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-02 22:50:34,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:34,067 INFO L225 Difference]: With dead ends: 209 [2021-11-02 22:50:34,067 INFO L226 Difference]: Without dead ends: 104 [2021-11-02 22:50:34,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:50:34,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-02 22:50:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-11-02 22:50:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.118279569892473) internal successors, (104), 93 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-11-02 22:50:34,077 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 75 [2021-11-02 22:50:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:34,078 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-11-02 22:50:34,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.384615384615385) internal successors, (96), 13 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:50:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-11-02 22:50:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-02 22:50:34,079 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:34,079 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:34,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:34,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:34,304 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:50:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:34,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1413596990, now seen corresponding path program 6 times [2021-11-02 22:50:34,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:34,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824660338] [2021-11-02 22:50:34,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:34,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:40,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:40,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824660338] [2021-11-02 22:50:40,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824660338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:40,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964353743] [2021-11-02 22:50:40,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 22:50:40,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:40,845 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:40,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:50:41,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 22:50:41,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:50:41,162 WARN L261 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 136 conjunts are in the unsatisfiable core [2021-11-02 22:50:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:50:52,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-02 22:50:52,481 INFO L354 Elim1Store]: treesize reduction 38, result has 54.8 percent of original size [2021-11-02 22:50:52,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 80 [2021-11-02 22:50:53,083 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:50:53,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964353743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:53,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:53,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 67] total 128 [2021-11-02 22:50:53,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665490674] [2021-11-02 22:50:53,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-02 22:50:53,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-02 22:50:53,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=15387, Unknown=0, NotChecked=0, Total=16256 [2021-11-02 22:50:53,091 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 128 states, 128 states have (on average 1.359375) internal successors, (174), 128 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:14,129 INFO L93 Difference]: Finished difference Result 271 states and 302 transitions. [2021-11-02 22:51:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-02 22:51:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.359375) internal successors, (174), 128 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-11-02 22:51:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:14,132 INFO L225 Difference]: With dead ends: 271 [2021-11-02 22:51:14,132 INFO L226 Difference]: Without dead ends: 182 [2021-11-02 22:51:14,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7746 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=1802, Invalid=26254, Unknown=0, NotChecked=0, Total=28056 [2021-11-02 22:51:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-02 22:51:14,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 173. [2021-11-02 22:51:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0813953488372092) internal successors, (186), 172 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:14,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 186 transitions. [2021-11-02 22:51:14,161 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 186 transitions. Word has length 93 [2021-11-02 22:51:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:14,162 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 186 transitions. [2021-11-02 22:51:14,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.359375) internal successors, (174), 128 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 186 transitions. [2021-11-02 22:51:14,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-02 22:51:14,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:14,165 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:14,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:14,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:14,372 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:51:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:14,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1310278752, now seen corresponding path program 7 times [2021-11-02 22:51:14,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:14,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999493281] [2021-11-02 22:51:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:14,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:14,494 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 22:51:14,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:14,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999493281] [2021-11-02 22:51:14,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999493281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:14,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110021564] [2021-11-02 22:51:14,495 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 22:51:14,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:14,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:14,496 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:14,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:51:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:14,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:51:14,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 22:51:15,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110021564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:15,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:15,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-02 22:51:15,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139089340] [2021-11-02 22:51:15,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:51:15,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:15,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:51:15,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:51:15,333 INFO L87 Difference]: Start difference. First operand 173 states and 186 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:15,727 INFO L93 Difference]: Finished difference Result 292 states and 311 transitions. [2021-11-02 22:51:15,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:51:15,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-02 22:51:15,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:15,731 INFO L225 Difference]: With dead ends: 292 [2021-11-02 22:51:15,731 INFO L226 Difference]: Without dead ends: 166 [2021-11-02 22:51:15,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:51:15,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-02 22:51:15,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-11-02 22:51:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.079268292682927) internal successors, (177), 164 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 177 transitions. [2021-11-02 22:51:15,747 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 177 transitions. Word has length 95 [2021-11-02 22:51:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 177 transitions. [2021-11-02 22:51:15,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 177 transitions. [2021-11-02 22:51:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-02 22:51:15,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:15,749 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:15,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-02 22:51:15,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 22:51:15,964 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:51:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:15,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1524797822, now seen corresponding path program 8 times [2021-11-02 22:51:15,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:15,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252596898] [2021-11-02 22:51:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:15,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-02 22:51:16,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:16,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252596898] [2021-11-02 22:51:16,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252596898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:16,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712732765] [2021-11-02 22:51:16,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:51:16,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:16,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:16,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:16,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:51:16,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:51:16,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 22:51:16,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-02 22:51:16,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712732765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:16,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:51:16,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-11-02 22:51:16,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118359718] [2021-11-02 22:51:16,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:51:16,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:51:16,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:51:16,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:51:16,794 INFO L87 Difference]: Start difference. First operand 165 states and 177 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:51:17,107 INFO L93 Difference]: Finished difference Result 261 states and 289 transitions. [2021-11-02 22:51:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:51:17,108 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-11-02 22:51:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:51:17,109 INFO L225 Difference]: With dead ends: 261 [2021-11-02 22:51:17,109 INFO L226 Difference]: Without dead ends: 126 [2021-11-02 22:51:17,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:51:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-02 22:51:17,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-02 22:51:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:17,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-11-02 22:51:17,116 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 97 [2021-11-02 22:51:17,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:51:17,116 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-11-02 22:51:17,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:51:17,116 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-11-02 22:51:17,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-02 22:51:17,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:51:17,117 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:51:17,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:51:17,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:17,325 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:51:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:51:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1433123212, now seen corresponding path program 9 times [2021-11-02 22:51:17,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:51:17,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391096100] [2021-11-02 22:51:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:51:17,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:51:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 4 proven. 172 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:51:28,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:51:28,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391096100] [2021-11-02 22:51:28,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391096100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:51:28,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765602695] [2021-11-02 22:51:28,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 22:51:28,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:51:28,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:51:28,763 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:51:28,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:51:29,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 22:51:29,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:51:29,323 WARN L261 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 183 conjunts are in the unsatisfiable core [2021-11-02 22:51:29,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:29,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-02 22:53:20,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:53:20,635 INFO L354 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2021-11-02 22:53:20,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 55 [2021-11-02 22:53:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 7 proven. 160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:53:22,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765602695] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:53:22,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:53:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 88] total 179 [2021-11-02 22:53:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765148758] [2021-11-02 22:53:22,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2021-11-02 22:53:22,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:53:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2021-11-02 22:53:22,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=31124, Unknown=2, NotChecked=0, Total=31862 [2021-11-02 22:53:22,018 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 179 states, 179 states have (on average 1.2458100558659218) internal successors, (223), 179 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:18,302 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-02 22:54:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 22:54:18,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-02 22:54:18,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:18,503 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:899) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:773) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:388) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:229) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 49 more [2021-11-02 22:54:18,507 INFO L168 Benchmark]: Toolchain (without parser) took 250541.63 ms. Allocated memory was 98.6 MB in the beginning and 264.2 MB in the end (delta: 165.7 MB). Free memory was 65.4 MB in the beginning and 105.2 MB in the end (delta: -39.8 MB). Peak memory consumption was 184.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:18,508 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory was 51.0 MB in the beginning and 51.0 MB in the end (delta: 40.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:54:18,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.68 ms. Allocated memory is still 98.6 MB. Free memory was 65.2 MB in the beginning and 73.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:18,508 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.59 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 71.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:18,508 INFO L168 Benchmark]: Boogie Preprocessor took 29.03 ms. Allocated memory is still 98.6 MB. Free memory was 71.0 MB in the beginning and 69.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:54:18,509 INFO L168 Benchmark]: RCFGBuilder took 550.59 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 57.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:18,509 INFO L168 Benchmark]: TraceAbstraction took 249604.70 ms. Allocated memory was 98.6 MB in the beginning and 264.2 MB in the end (delta: 165.7 MB). Free memory was 56.7 MB in the beginning and 105.2 MB in the end (delta: -48.6 MB). Peak memory consumption was 176.7 MB. Max. memory is 16.1 GB. [2021-11-02 22:54:18,510 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 98.6 MB. Free memory was 51.0 MB in the beginning and 51.0 MB in the end (delta: 40.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.68 ms. Allocated memory is still 98.6 MB. Free memory was 65.2 MB in the beginning and 73.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.59 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 71.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.03 ms. Allocated memory is still 98.6 MB. Free memory was 71.0 MB in the beginning and 69.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 550.59 ms. Allocated memory is still 98.6 MB. Free memory was 69.6 MB in the beginning and 57.0 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 249604.70 ms. Allocated memory was 98.6 MB in the beginning and 264.2 MB in the end (delta: 165.7 MB). Free memory was 56.7 MB in the beginning and 105.2 MB in the end (delta: -48.6 MB). Peak memory consumption was 176.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU --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 afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:54:20,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:54:20,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:54:20,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:54:20,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:54:20,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:54:20,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:54:20,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:54:20,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:54:20,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:54:20,953 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:54:20,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:54:20,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:54:20,959 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:54:20,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:54:20,966 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:54:20,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:54:20,969 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:54:20,972 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:54:20,985 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:54:20,988 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:54:20,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:54:20,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:54:20,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:54:21,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:54:21,004 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:54:21,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:54:21,007 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:54:21,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:54:21,009 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:54:21,009 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:54:21,010 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:54:21,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:54:21,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:54:21,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:54:21,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:54:21,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:54:21,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:54:21,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:54:21,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:54:21,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:54:21,044 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-11-02 22:54:21,094 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:54:21,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:54:21,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:54:21,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:54:21,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:54:21,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:54:21,099 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:54:21,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:54:21,100 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:54:21,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:54:21,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:54:21,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 22:54:21,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:54:21,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 22:54:21,103 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:54:21,103 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:54:21,103 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:54:21,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:54:21,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:54:21,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 22:54:21,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:54:21,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:54:21,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:54:21,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:21,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:54:21,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:54:21,107 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 22:54:21,107 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:54:21,107 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:54:21,108 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 22:54:21,108 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 22:54:21,108 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 22:54:21,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:54:21,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:54:21,109 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> afdb8b285c2183da613babde617c7580c3aee6b3bc694b080468400e828cda16 [2021-11-02 22:54:21,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:54:21,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:54:21,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:54:21,604 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:54:21,605 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:54:21,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-11-02 22:54:21,696 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/6556c3200/7e2482320297474eac07030ee8b26a66/FLAG08e78bd6f [2021-11-02 22:54:22,290 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:54:22,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/sv-benchmarks/c/array-crafted/zero_sum_m5.c [2021-11-02 22:54:22,311 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/6556c3200/7e2482320297474eac07030ee8b26a66/FLAG08e78bd6f [2021-11-02 22:54:22,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/data/6556c3200/7e2482320297474eac07030ee8b26a66 [2021-11-02 22:54:22,650 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:54:22,651 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:54:22,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:22,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:54:22,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:54:22,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:22,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100dc885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22, skipping insertion in model container [2021-11-02 22:54:22,664 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:22,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:54:22,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:54:22,868 WARN L228 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_79312361-6be6-4717-962b-b1bb6417b4ef/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2021-11-02 22:54:22,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:22,913 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:54:22,934 WARN L228 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_79312361-6be6-4717-962b-b1bb6417b4ef/sv-benchmarks/c/array-crafted/zero_sum_m5.c[402,415] [2021-11-02 22:54:22,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:22,970 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:54:22,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22 WrapperNode [2021-11-02 22:54:22,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:22,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:54:22,973 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:54:22,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:54:22,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:54:23,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:54:23,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:54:23,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:54:23,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,081 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:54:23,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:54:23,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:54:23,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:54:23,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (1/1) ... [2021-11-02 22:54:23,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:23,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:23,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:54:23,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:54:23,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:54:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:54:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-02 22:54:23,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:54:23,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:54:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-02 22:54:23,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:54:23,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:54:23,844 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-02 22:54:23,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:23 BoogieIcfgContainer [2021-11-02 22:54:23,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:54:23,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:54:23,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:54:23,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:54:23,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:54:22" (1/3) ... [2021-11-02 22:54:23,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793a6074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:23, skipping insertion in model container [2021-11-02 22:54:23,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:22" (2/3) ... [2021-11-02 22:54:23,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@793a6074 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:23, skipping insertion in model container [2021-11-02 22:54:23,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:23" (3/3) ... [2021-11-02 22:54:23,855 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m5.c [2021-11-02 22:54:23,861 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:54:23,861 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 22:54:23,915 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:54:23,923 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 [2021-11-02 22:54:23,923 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 22:54:23,940 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:23,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:54:23,947 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:23,948 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:23,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:23,955 INFO L85 PathProgramCache]: Analyzing trace with hash 226651140, now seen corresponding path program 1 times [2021-11-02 22:54:23,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:23,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209274071] [2021-11-02 22:54:23,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:23,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:23,985 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:24,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:54:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:24,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-02 22:54:24,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:24,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:24,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:24,267 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:24,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209274071] [2021-11-02 22:54:24,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209274071] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:24,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:24,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:54:24,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223806553] [2021-11-02 22:54:24,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 22:54:24,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 22:54:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:54:24,293 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 43 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:24,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:24,314 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2021-11-02 22:54:24,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 22:54:24,316 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:54:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:24,325 INFO L225 Difference]: With dead ends: 83 [2021-11-02 22:54:24,325 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 22:54:24,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 22:54:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 22:54:24,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-02 22:54:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-02 22:54:24,367 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 27 [2021-11-02 22:54:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:24,368 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-02 22:54:24,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.5) internal successors, (27), 2 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-02 22:54:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 22:54:24,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:24,370 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:24,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:24,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:54:24,585 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:24,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:24,586 INFO L85 PathProgramCache]: Analyzing trace with hash -833651044, now seen corresponding path program 1 times [2021-11-02 22:54:24,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:24,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1263911567] [2021-11-02 22:54:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:24,588 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:24,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:24,589 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:24,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:54:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:54:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:24,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:25,047 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:25,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1263911567] [2021-11-02 22:54:25,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1263911567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:25,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:25,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-02 22:54:25,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94517901] [2021-11-02 22:54:25,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:25,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:25,060 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:25,188 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-11-02 22:54:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:25,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 22:54:25,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:25,190 INFO L225 Difference]: With dead ends: 62 [2021-11-02 22:54:25,190 INFO L226 Difference]: Without dead ends: 58 [2021-11-02 22:54:25,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-02 22:54:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-02 22:54:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2021-11-02 22:54:25,217 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 27 [2021-11-02 22:54:25,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:25,218 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2021-11-02 22:54:25,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2021-11-02 22:54:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 22:54:25,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:25,220 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:25,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:25,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:54:25,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:25,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash -829891778, now seen corresponding path program 1 times [2021-11-02 22:54:25,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:25,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831987412] [2021-11-02 22:54:25,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:25,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:25,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:25,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:25,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:54:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:54:25,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:25,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:25,837 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:25,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831987412] [2021-11-02 22:54:25,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831987412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:25,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:25,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-02 22:54:25,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911163668] [2021-11-02 22:54:25,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:25,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:25,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:25,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:25,850 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:26,025 INFO L93 Difference]: Finished difference Result 114 states and 153 transitions. [2021-11-02 22:54:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:26,026 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 22:54:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:26,028 INFO L225 Difference]: With dead ends: 114 [2021-11-02 22:54:26,028 INFO L226 Difference]: Without dead ends: 61 [2021-11-02 22:54:26,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:26,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-02 22:54:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-02 22:54:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 60 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:26,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 80 transitions. [2021-11-02 22:54:26,046 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 80 transitions. Word has length 29 [2021-11-02 22:54:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:26,047 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 80 transitions. [2021-11-02 22:54:26,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:26,050 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 80 transitions. [2021-11-02 22:54:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 22:54:26,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:26,053 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:26,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:26,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:54:26,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:26,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:26,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1904119806, now seen corresponding path program 1 times [2021-11-02 22:54:26,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:26,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1995737593] [2021-11-02 22:54:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:26,270 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:26,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:26,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:54:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:26,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:54:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:26,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:27,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:27,053 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:27,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1995737593] [2021-11-02 22:54:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1995737593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:54:27,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:54:27,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-02 22:54:27,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283127214] [2021-11-02 22:54:27,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:54:27,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:54:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:54:27,057 INFO L87 Difference]: Start difference. First operand 61 states and 80 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:28,034 INFO L93 Difference]: Finished difference Result 168 states and 234 transitions. [2021-11-02 22:54:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:54:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-02 22:54:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:28,036 INFO L225 Difference]: With dead ends: 168 [2021-11-02 22:54:28,037 INFO L226 Difference]: Without dead ends: 119 [2021-11-02 22:54:28,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:54:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-02 22:54:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-11-02 22:54:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:28,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2021-11-02 22:54:28,088 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 33 [2021-11-02 22:54:28,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:28,089 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2021-11-02 22:54:28,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2021-11-02 22:54:28,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 22:54:28,094 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:28,094 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:28,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-02 22:54:28,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:54:28,310 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:28,310 INFO L85 PathProgramCache]: Analyzing trace with hash 145378838, now seen corresponding path program 1 times [2021-11-02 22:54:28,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:28,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1076401454] [2021-11-02 22:54:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:28,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:28,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:28,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:28,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:54:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:28,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:54:28,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:54:28,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:54:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:54:29,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:54:29,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1076401454] [2021-11-02 22:54:29,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1076401454] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 22:54:29,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:54:29,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-02 22:54:29,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284752500] [2021-11-02 22:54:29,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:54:29,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:54:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:54:29,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:54:29,295 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:30,665 INFO L93 Difference]: Finished difference Result 265 states and 323 transitions. [2021-11-02 22:54:30,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:54:30,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 22:54:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:30,673 INFO L225 Difference]: With dead ends: 265 [2021-11-02 22:54:30,673 INFO L226 Difference]: Without dead ends: 225 [2021-11-02 22:54:30,674 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:54:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-11-02 22:54:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 72. [2021-11-02 22:54:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2021-11-02 22:54:30,698 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 53 [2021-11-02 22:54:30,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:30,699 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2021-11-02 22:54:30,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:54:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2021-11-02 22:54:30,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-02 22:54:30,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:30,704 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:30,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-02 22:54:30,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:54:30,917 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 22:54:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -813057144, now seen corresponding path program 2 times [2021-11-02 22:54:30,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:54:30,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [654115370] [2021-11-02 22:54:30,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:54:30,919 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:54:30,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:54:30,920 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:54:30,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_79312361-6be6-4717-962b-b1bb6417b4ef/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 23:01:22,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:22,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:23,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:01:23,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:31,326 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 23:01:31,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 21 [2021-11-02 23:01:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:01:31,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 23:02:48,651 INFO L354 Elim1Store]: treesize reduction 39, result has 52.4 percent of original size [2021-11-02 23:02:48,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-11-02 23:03:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:03:06,509 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 23:03:06,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [654115370] [2021-11-02 23:03:06,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [654115370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 23:03:06,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:03:06,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 40] total 68 [2021-11-02 23:03:06,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739586257] [2021-11-02 23:03:06,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-02 23:03:06,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 23:03:06,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-02 23:03:06,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4368, Unknown=15, NotChecked=0, Total=4556 [2021-11-02 23:03:06,516 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 68 states, 68 states have (on average 1.6911764705882353) internal successors, (115), 68 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)