./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF --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 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:11:55,973 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:11:55,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:11:56,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:11:56,014 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:11:56,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:11:56,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:11:56,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:11:56,023 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:11:56,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:11:56,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:11:56,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:11:56,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:11:56,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:11:56,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:11:56,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:11:56,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:11:56,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:11:56,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:11:56,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:11:56,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:11:56,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:11:56,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:11:56,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:11:56,051 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:11:56,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:11:56,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:11:56,053 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:11:56,054 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:11:56,055 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:11:56,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:11:56,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:11:56,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:11:56,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:11:56,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:11:56,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:11:56,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:11:56,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:11:56,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:11:56,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:11:56,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:11:56,071 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:11:56,110 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:11:56,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:11:56,115 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:11:56,115 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:11:56,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:11:56,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:11:56,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:11:56,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:11:56,125 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:11:56,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:11:56,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:11:56,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:11:56,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:11:56,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:11:56,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:11:56,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:11:56,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:11:56,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:11:56,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:11:56,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:11:56,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:11:56,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:11:56,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:11:56,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:11:56,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:11:56,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:11:56,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:11:56,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:11:56,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:11:56,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:11:56,132 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:11:56,132 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:11:56,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:11:56,133 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:11:56,133 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_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4615816b63186e8ef25ffa56a09fb574b90534edb7a787dbb36e36eb2c34dee2 [2021-11-20 07:11:56,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:11:56,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:11:56,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:11:56,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:11:56,466 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:11:56,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-11-20 07:11:56,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/data/b75036c4e/8f90e59b8aed4a9ab946fc327c637308/FLAG0373abc9a [2021-11-20 07:11:57,065 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:11:57,065 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c [2021-11-20 07:11:57,072 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/data/b75036c4e/8f90e59b8aed4a9ab946fc327c637308/FLAG0373abc9a [2021-11-20 07:11:57,469 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/data/b75036c4e/8f90e59b8aed4a9ab946fc327c637308 [2021-11-20 07:11:57,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:11:57,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:11:57,476 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:11:57,476 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:11:57,478 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:11:57,480 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,482 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@225688cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57, skipping insertion in model container [2021-11-20 07:11:57,482 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,490 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:11:57,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:11:57,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2021-11-20 07:11:57,687 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:11:57,694 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:11:57,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/sv-benchmarks/c/nla-digbench-scaling/sqrt1-ll_unwindbound10.c[520,533] [2021-11-20 07:11:57,713 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:11:57,724 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:11:57,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57 WrapperNode [2021-11-20 07:11:57,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:11:57,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:11:57,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:11:57,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:11:57,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,757 INFO L137 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2021-11-20 07:11:57,757 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:11:57,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:11:57,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:11:57,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:11:57,767 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,769 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,769 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:11:57,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:11:57,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:11:57,780 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:11:57,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (1/1) ... [2021-11-20 07:11:57,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:11:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:57,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:11:57,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:11:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:11:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:11:57,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:11:57,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:11:57,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 07:11:57,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 07:11:57,910 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:11:57,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:11:58,003 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:11:58,009 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:11:58,009 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:11:58,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:11:58 BoogieIcfgContainer [2021-11-20 07:11:58,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:11:58,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:11:58,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:11:58,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:11:58,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:11:57" (1/3) ... [2021-11-20 07:11:58,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a019a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:11:58, skipping insertion in model container [2021-11-20 07:11:58,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:11:57" (2/3) ... [2021-11-20 07:11:58,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a019a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:11:58, skipping insertion in model container [2021-11-20 07:11:58,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:11:58" (3/3) ... [2021-11-20 07:11:58,021 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound10.c [2021-11-20 07:11:58,026 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:11:58,027 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:11:58,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:11:58,078 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 [2021-11-20 07:11:58,079 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:11:58,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 07:11:58,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:11:58,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:58,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:58,102 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:11:58,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:58,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1821846948, now seen corresponding path program 1 times [2021-11-20 07:11:58,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:58,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249702940] [2021-11-20 07:11:58,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:58,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:58,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:58,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:58,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249702940] [2021-11-20 07:11:58,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249702940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:58,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:58,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:11:58,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108014077] [2021-11-20 07:11:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:58,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:11:58,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:58,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:11:58,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:11:58,279 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:11:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:58,304 INFO L93 Difference]: Finished difference Result 40 states and 62 transitions. [2021-11-20 07:11:58,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:11:58,306 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 07:11:58,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:58,315 INFO L225 Difference]: With dead ends: 40 [2021-11-20 07:11:58,316 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 07:11:58,320 INFO L932 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 [2021-11-20 07:11:58,328 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:58,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:11:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 07:11:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 07:11:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:11:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-20 07:11:58,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 7 [2021-11-20 07:11:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:58,393 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-20 07:11:58,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:11:58,394 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-20 07:11:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 07:11:58,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:58,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:58,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:11:58,397 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:11:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash 178653015, now seen corresponding path program 1 times [2021-11-20 07:11:58,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:58,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654932920] [2021-11-20 07:11:58,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:58,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:58,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:58,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654932920] [2021-11-20 07:11:58,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654932920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:58,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:58,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:11:58,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432931303] [2021-11-20 07:11:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:58,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:11:58,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:58,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:11:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:11:58,562 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:11:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:58,586 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2021-11-20 07:11:58,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:11:58,601 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 07:11:58,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:58,602 INFO L225 Difference]: With dead ends: 28 [2021-11-20 07:11:58,602 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 07:11:58,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:11:58,604 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:58,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:11:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 07:11:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-20 07:11:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:11:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-11-20 07:11:58,612 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 8 [2021-11-20 07:11:58,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:58,612 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-11-20 07:11:58,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:11:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-11-20 07:11:58,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 07:11:58,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:58,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:11:58,630 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:11:58,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash 180321311, now seen corresponding path program 1 times [2021-11-20 07:11:58,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:58,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003394890] [2021-11-20 07:11:58,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:58,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:58,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:58,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:58,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003394890] [2021-11-20 07:11:58,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003394890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:58,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:58,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:11:58,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479980096] [2021-11-20 07:11:58,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:58,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:11:58,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:58,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:11:58,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:11:58,786 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:11:58,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:58,880 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2021-11-20 07:11:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:11:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 07:11:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:58,884 INFO L225 Difference]: With dead ends: 32 [2021-11-20 07:11:58,885 INFO L226 Difference]: Without dead ends: 30 [2021-11-20 07:11:58,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:11:58,888 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:58,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:11:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-20 07:11:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-11-20 07:11:58,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:11:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2021-11-20 07:11:58,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2021-11-20 07:11:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:58,916 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2021-11-20 07:11:58,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:11:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2021-11-20 07:11:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:11:58,917 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:58,918 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:58,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:11:58,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:11:58,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:58,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1242689983, now seen corresponding path program 1 times [2021-11-20 07:11:58,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:58,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504553955] [2021-11-20 07:11:58,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:58,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:58,933 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:11:58,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817023559] [2021-11-20 07:11:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:58,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:58,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:58,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:58,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:11:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:11:59,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:59,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:11:59,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:59,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504553955] [2021-11-20 07:11:59,185 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:11:59,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817023559] [2021-11-20 07:11:59,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817023559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:59,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:59,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:11:59,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587813867] [2021-11-20 07:11:59,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:59,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:11:59,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:59,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:11:59,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:11:59,188 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:59,237 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-11-20 07:11:59,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:11:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-20 07:11:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:59,239 INFO L225 Difference]: With dead ends: 36 [2021-11-20 07:11:59,239 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:11:59,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:11:59,241 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:59,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 84 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:11:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:11:59,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-20 07:11:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 07:11:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-20 07:11:59,254 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 13 [2021-11-20 07:11:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:59,255 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-20 07:11:59,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 07:11:59,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-20 07:11:59,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:11:59,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:59,256 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:59,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:59,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:59,457 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:11:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 892115231, now seen corresponding path program 1 times [2021-11-20 07:11:59,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:59,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118126948] [2021-11-20 07:11:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:59,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:59,468 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:11:59,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326816144] [2021-11-20 07:11:59,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:59,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:59,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:59,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:59,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:11:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:59,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:11:59,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:11:59,618 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:11:59,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:11:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118126948] [2021-11-20 07:11:59,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:11:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326816144] [2021-11-20 07:11:59,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326816144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:11:59,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:11:59,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:11:59,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532192168] [2021-11-20 07:11:59,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:11:59,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:11:59,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:11:59,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:11:59,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:11:59,622 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:11:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:59,662 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2021-11-20 07:11:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:11:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-20 07:11:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:59,664 INFO L225 Difference]: With dead ends: 40 [2021-11-20 07:11:59,664 INFO L226 Difference]: Without dead ends: 35 [2021-11-20 07:11:59,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:11:59,666 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:59,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:11:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-20 07:11:59,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-20 07:11:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-20 07:11:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-20 07:11:59,674 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 18 [2021-11-20 07:11:59,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:59,674 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-20 07:11:59,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 07:11:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-20 07:11:59,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:11:59,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:59,676 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:59,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:59,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:59,897 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:11:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash 259746456, now seen corresponding path program 1 times [2021-11-20 07:11:59,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:11:59,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490695173] [2021-11-20 07:11:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:59,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:11:59,912 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:11:59,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848921933] [2021-11-20 07:11:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:59,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:11:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:11:59,913 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:11:59,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:12:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:12:00,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:12:00,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:12:00,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:00,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490695173] [2021-11-20 07:12:00,170 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:00,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848921933] [2021-11-20 07:12:00,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848921933] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:00,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:00,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-20 07:12:00,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542750148] [2021-11-20 07:12:00,171 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:00,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:12:00,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:12:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:12:00,173 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:12:00,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:00,272 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-20 07:12:00,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:12:00,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2021-11-20 07:12:00,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:00,274 INFO L225 Difference]: With dead ends: 76 [2021-11-20 07:12:00,274 INFO L226 Difference]: Without dead ends: 67 [2021-11-20 07:12:00,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:12:00,276 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:00,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 141 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:12:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-20 07:12:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-11-20 07:12:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 38 states have internal predecessors, (42), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 07:12:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2021-11-20 07:12:00,290 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 26 [2021-11-20 07:12:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2021-11-20 07:12:00,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 07:12:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2021-11-20 07:12:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 07:12:00,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:00,292 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:00,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:00,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 07:12:00,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:12:00,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:00,506 INFO L85 PathProgramCache]: Analyzing trace with hash 261414752, now seen corresponding path program 1 times [2021-11-20 07:12:00,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:00,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922997848] [2021-11-20 07:12:00,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:00,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:00,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021081733] [2021-11-20 07:12:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:00,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:00,519 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:00,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:12:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:12:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:12:00,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:12:00,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:12:00,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:00,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922997848] [2021-11-20 07:12:00,824 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:00,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021081733] [2021-11-20 07:12:00,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021081733] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 07:12:00,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:12:00,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 07:12:00,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11713613] [2021-11-20 07:12:00,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:12:00,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:12:00,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:00,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:12:00,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:12:00,828 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:00,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:00,926 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2021-11-20 07:12:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:12:00,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-20 07:12:00,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:00,934 INFO L225 Difference]: With dead ends: 77 [2021-11-20 07:12:00,935 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 07:12:00,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:12:00,936 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 7 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:00,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:12:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 07:12:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-11-20 07:12:00,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 47 states have internal predecessors, (51), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 07:12:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2021-11-20 07:12:00,957 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 26 [2021-11-20 07:12:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:00,958 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2021-11-20 07:12:00,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 07:12:00,958 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2021-11-20 07:12:00,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:12:00,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:00,959 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:00,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:01,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:01,182 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:12:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash -857109600, now seen corresponding path program 2 times [2021-11-20 07:12:01,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:01,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978953070] [2021-11-20 07:12:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:01,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:01,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:01,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721960273] [2021-11-20 07:12:01,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:12:01,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:01,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:01,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:01,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:12:01,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:12:01,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:12:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:12:01,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 07:12:01,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:01,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978953070] [2021-11-20 07:12:01,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:01,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721960273] [2021-11-20 07:12:01,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721960273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:01,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:01,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-20 07:12:01,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930074986] [2021-11-20 07:12:01,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:01,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:12:01,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:12:01,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:12:01,662 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:12:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:01,879 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2021-11-20 07:12:01,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:12:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 31 [2021-11-20 07:12:01,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:01,882 INFO L225 Difference]: With dead ends: 90 [2021-11-20 07:12:01,882 INFO L226 Difference]: Without dead ends: 81 [2021-11-20 07:12:01,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:12:01,884 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:01,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:12:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-20 07:12:01,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-20 07:12:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 18 states have call successors, (18), 11 states have call predecessors, (18), 11 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-20 07:12:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-20 07:12:01,900 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 31 [2021-11-20 07:12:01,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:01,901 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-20 07:12:01,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-20 07:12:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-20 07:12:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:12:01,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:12:01,903 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-20 07:12:01,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:02,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 07:12:02,129 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:12:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:12:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1192261919, now seen corresponding path program 3 times [2021-11-20 07:12:02,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:12:02,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666334460] [2021-11-20 07:12:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:12:02,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:12:02,138 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:12:02,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863646226] [2021-11-20 07:12:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:12:02,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:12:02,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:12:02,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:12:02,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:12:02,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:12:02,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:12:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:12:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:02,483 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 36 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:12:02,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:12:02,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:12:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666334460] [2021-11-20 07:12:02,942 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:12:02,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863646226] [2021-11-20 07:12:02,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863646226] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:02,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:02,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-20 07:12:02,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998682711] [2021-11-20 07:12:02,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:02,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:12:02,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:12:02,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:12:02,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:12:02,948 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 07:12:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:12:03,267 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-20 07:12:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:12:03,268 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 54 [2021-11-20 07:12:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:12:03,268 INFO L225 Difference]: With dead ends: 80 [2021-11-20 07:12:03,268 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 07:12:03,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:12:03,270 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:12:03,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 134 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:12:03,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 07:12:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 07:12:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:12:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 07:12:03,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-11-20 07:12:03,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:12:03,272 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 07:12:03,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-20 07:12:03,272 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 07:12:03,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 07:12:03,275 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:12:03,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:12:03,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 07:12:03,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 07:12:03,991 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-11-20 07:12:03,991 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 07:12:03,991 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-11-20 07:12:03,991 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-11-20 07:12:03,992 INFO L861 garLoopResultBuilder]: At program point L48(lines 21 49) the Hoare annotation is: true [2021-11-20 07:12:03,992 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2021-11-20 07:12:03,992 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-11-20 07:12:03,992 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-11-20 07:12:03,992 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 07:12:03,992 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 07:12:03,992 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-11-20 07:12:03,992 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 07:12:03,992 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-11-20 07:12:03,993 INFO L854 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2021-11-20 07:12:03,993 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= |ULTIMATE.start_main_~t~0#1| 1) (= |ULTIMATE.start_main_~s~0#1| 1)) (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* 4 |ULTIMATE.start_main_~s~0#1|) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1)))) [2021-11-20 07:12:03,993 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-11-20 07:12:03,993 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-11-20 07:12:03,993 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-11-20 07:12:03,993 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-11-20 07:12:03,993 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-11-20 07:12:03,993 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-11-20 07:12:03,996 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2021-11-20 07:12:03,997 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:12:04,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:12:04 BoogieIcfgContainer [2021-11-20 07:12:04,010 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:12:04,011 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:12:04,011 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:12:04,011 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:12:04,011 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:11:58" (3/4) ... [2021-11-20 07:12:04,014 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 07:12:04,020 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-20 07:12:04,024 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-20 07:12:04,024 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 07:12:04,024 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 07:12:04,024 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 07:12:04,056 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:12:04,056 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:12:04,056 INFO L158 Benchmark]: Toolchain (without parser) took 6583.70ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 58.2MB in the beginning and 79.3MB in the end (delta: -21.1MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,057 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:12:04,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 249.45ms. Allocated memory is still 92.3MB. Free memory was 58.0MB in the beginning and 68.3MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,057 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.80ms. Allocated memory is still 92.3MB. Free memory was 68.3MB in the beginning and 66.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,058 INFO L158 Benchmark]: Boogie Preprocessor took 20.96ms. Allocated memory is still 92.3MB. Free memory was 66.9MB in the beginning and 65.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,058 INFO L158 Benchmark]: RCFGBuilder took 231.70ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 56.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,059 INFO L158 Benchmark]: TraceAbstraction took 5996.70ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 56.1MB in the beginning and 82.4MB in the end (delta: -26.3MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,059 INFO L158 Benchmark]: Witness Printer took 45.21ms. Allocated memory is still 117.4MB. Free memory was 82.4MB in the beginning and 79.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:12:04,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 92.3MB. Free memory was 64.4MB in the beginning and 64.4MB in the end (delta: 27.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 249.45ms. Allocated memory is still 92.3MB. Free memory was 58.0MB in the beginning and 68.3MB in the end (delta: -10.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.80ms. Allocated memory is still 92.3MB. Free memory was 68.3MB in the beginning and 66.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.96ms. Allocated memory is still 92.3MB. Free memory was 66.9MB in the beginning and 65.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 231.70ms. Allocated memory is still 92.3MB. Free memory was 65.7MB in the beginning and 56.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5996.70ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 56.1MB in the beginning and 82.4MB in the end (delta: -26.3MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. * Witness Printer took 45.21ms. Allocated memory is still 117.4MB. Free memory was 82.4MB in the beginning and 79.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.9s, OverallIterations: 9, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 113 mSDsluCounter, 777 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 559 mSDsCounter, 112 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 520 IncrementalHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 112 mSolverCounterUnsat, 218 mSDtfsCounter, 520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=8, InterpolantAutomatonStates: 58, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 44 PreInvPairs, 74 NumberOfFragments, 150 HoareAnnotationTreeSize, 44 FomulaSimplifications, 63 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 794 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 191 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 315 ConstructedInterpolants, 0 QuantifiedInterpolants, 1467 SizeOfPredicates, 10 NumberOfNonLiveVariables, 516 ConjunctsInSsa, 71 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 404/452 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t == 1 + 2 * a && 4 * s == t * t + 2 * t + 1 RESULT: Ultimate proved your program to be correct! [2021-11-20 07:12:04,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e03abaae-348b-4497-8cce-e9c73f9a117a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE