./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL --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 7f552e336cb6eb3ea16ba25a84411e1d0c8dcfaa2b088c21df87ffefed1a84a7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:07:00,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:07:00,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:07:01,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:07:01,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:07:01,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:07:01,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:07:01,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:07:01,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:07:01,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:07:01,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:07:01,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:07:01,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:07:01,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:07:01,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:07:01,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:07:01,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:07:01,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:07:01,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:07:01,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:07:01,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:07:01,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:07:01,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:07:01,084 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:07:01,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:07:01,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:07:01,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:07:01,094 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:07:01,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:07:01,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:07:01,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:07:01,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:07:01,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:07:01,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:07:01,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:07:01,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:07:01,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:07:01,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:07:01,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:07:01,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:07:01,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:07:01,108 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:07:01,162 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:07:01,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:07:01,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:07:01,164 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:07:01,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:07:01,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:07:01,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:07:01,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:07:01,172 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:07:01,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:07:01,174 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:07:01,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:07:01,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:07:01,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:07:01,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:07:01,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:07:01,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:07:01,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:07:01,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:07:01,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:07:01,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:07:01,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:07:01,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:07:01,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:07:01,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:07:01,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:07:01,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:07:01,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:07:01,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:07:01,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:07:01,179 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:07:01,179 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:07:01,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:07:01,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:07:01,180 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_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f552e336cb6eb3ea16ba25a84411e1d0c8dcfaa2b088c21df87ffefed1a84a7 [2021-11-19 04:07:01,520 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:07:01,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:07:01,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:07:01,568 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:07:01,569 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:07:01,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i [2021-11-19 04:07:01,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/data/f80f3c49e/33af82ee2ee94e6aae0ba392c4c11d65/FLAG53041bfc4 [2021-11-19 04:07:02,355 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:07:02,356 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i [2021-11-19 04:07:02,394 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/data/f80f3c49e/33af82ee2ee94e6aae0ba392c4c11d65/FLAG53041bfc4 [2021-11-19 04:07:02,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/data/f80f3c49e/33af82ee2ee94e6aae0ba392c4c11d65 [2021-11-19 04:07:02,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:07:02,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:07:02,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:07:02,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:07:02,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:07:02,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:07:02" (1/1) ... [2021-11-19 04:07:02,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2caf74d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:02, skipping insertion in model container [2021-11-19 04:07:02,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:07:02" (1/1) ... [2021-11-19 04:07:02,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:07:02,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:07:03,165 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_1fec842c-2e70-4f32-8765-253459d8830d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i[33021,33034] [2021-11-19 04:07:03,261 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:07:03,270 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:07:03,302 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_1fec842c-2e70-4f32-8765-253459d8830d/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test1-2.i[33021,33034] [2021-11-19 04:07:03,388 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:07:03,447 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:07:03,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03 WrapperNode [2021-11-19 04:07:03,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:07:03,448 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:07:03,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:07:03,449 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:07:03,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,566 INFO L137 Inliner]: procedures = 177, calls = 237, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 776 [2021-11-19 04:07:03,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:07:03,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:07:03,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:07:03,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:07:03,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,656 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:07:03,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:07:03,678 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:07:03,678 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:07:03,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (1/1) ... [2021-11-19 04:07:03,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:07:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:03,725 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:07:03,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:07:03,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:07:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:07:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:07:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:07:03,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-19 04:07:03,758 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-19 04:07:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:07:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:07:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:07:03,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:07:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:07:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:07:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:07:03,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:07:03,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:07:03,967 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:07:03,969 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:07:05,079 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:07:05,094 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:07:05,096 INFO L301 CfgBuilder]: Removed 40 assume(true) statements. [2021-11-19 04:07:05,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:07:05 BoogieIcfgContainer [2021-11-19 04:07:05,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:07:05,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:07:05,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:07:05,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:07:05,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:07:02" (1/3) ... [2021-11-19 04:07:05,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0c70c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:07:05, skipping insertion in model container [2021-11-19 04:07:05,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:07:03" (2/3) ... [2021-11-19 04:07:05,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f0c70c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:07:05, skipping insertion in model container [2021-11-19 04:07:05,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:07:05" (3/3) ... [2021-11-19 04:07:05,135 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test1-2.i [2021-11-19 04:07:05,141 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:07:05,142 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:07:05,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:07:05,204 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 [2021-11-19 04:07:05,204 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:07:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 140 states have (on average 1.6714285714285715) internal successors, (234), 151 states have internal predecessors, (234), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:07:05,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:07:05,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:05,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:05,240 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:05,246 INFO L85 PathProgramCache]: Analyzing trace with hash -384684060, now seen corresponding path program 1 times [2021-11-19 04:07:05,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:05,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928902327] [2021-11-19 04:07:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:05,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:05,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:07:05,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:05,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928902327] [2021-11-19 04:07:05,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928902327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:05,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:07:05,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:07:05,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440458864] [2021-11-19 04:07:05,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:05,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:07:05,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:05,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:07:05,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:07:05,492 INFO L87 Difference]: Start difference. First operand has 157 states, 140 states have (on average 1.6714285714285715) internal successors, (234), 151 states have internal predecessors, (234), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:07:05,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:05,574 INFO L93 Difference]: Finished difference Result 399 states and 677 transitions. [2021-11-19 04:07:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:07:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 04:07:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:05,591 INFO L225 Difference]: With dead ends: 399 [2021-11-19 04:07:05,592 INFO L226 Difference]: Without dead ends: 211 [2021-11-19 04:07:05,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:07:05,601 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 107 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:05,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 425 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:07:05,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-11-19 04:07:05,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 125. [2021-11-19 04:07:05,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 109 states have (on average 1.3394495412844036) internal successors, (146), 119 states have internal predecessors, (146), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:07:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2021-11-19 04:07:05,682 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 10 [2021-11-19 04:07:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:05,683 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2021-11-19 04:07:05,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:07:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2021-11-19 04:07:05,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:07:05,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:05,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:05,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:07:05,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1579896873, now seen corresponding path program 1 times [2021-11-19 04:07:05,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:05,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890958548] [2021-11-19 04:07:05,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:05,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:05,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:07:05,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429019737] [2021-11-19 04:07:05,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:05,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:05,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:05,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:05,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:07:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:05,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:07:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:07:06,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:07:06,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:06,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890958548] [2021-11-19 04:07:06,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:07:06,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429019737] [2021-11-19 04:07:06,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429019737] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:06,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:07:06,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:07:06,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242776407] [2021-11-19 04:07:06,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:06,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:07:06,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:07:06,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:07:06,248 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-19 04:07:06,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:06,376 INFO L93 Difference]: Finished difference Result 268 states and 372 transitions. [2021-11-19 04:07:06,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:07:06,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 61 [2021-11-19 04:07:06,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:06,379 INFO L225 Difference]: With dead ends: 268 [2021-11-19 04:07:06,380 INFO L226 Difference]: Without dead ends: 146 [2021-11-19 04:07:06,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:07:06,383 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 9 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:06,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 287 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:07:06,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-19 04:07:06,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-19 04:07:06,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 129 states have (on average 1.2868217054263567) internal successors, (166), 139 states have internal predecessors, (166), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:07:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-11-19 04:07:06,403 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 61 [2021-11-19 04:07:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:06,404 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-11-19 04:07:06,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2021-11-19 04:07:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-11-19 04:07:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:07:06,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:06,407 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:06,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:07:06,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:06,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1226808491, now seen corresponding path program 1 times [2021-11-19 04:07:06,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:06,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62807983] [2021-11-19 04:07:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:06,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:06,653 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:07:06,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [512437055] [2021-11-19 04:07:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:06,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:06,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:06,655 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:06,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:07:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:06,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:07:06,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:07:07,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:07:07,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62807983] [2021-11-19 04:07:07,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:07:07,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512437055] [2021-11-19 04:07:07,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512437055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:07,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:07:07,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:07:07,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272296614] [2021-11-19 04:07:07,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:07,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:07:07,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:07,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:07:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:07:07,008 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 04:07:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:07,111 INFO L93 Difference]: Finished difference Result 279 states and 373 transitions. [2021-11-19 04:07:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:07:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 61 [2021-11-19 04:07:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:07,114 INFO L225 Difference]: With dead ends: 279 [2021-11-19 04:07:07,114 INFO L226 Difference]: Without dead ends: 137 [2021-11-19 04:07:07,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:07:07,117 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:07,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 317 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:07:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-19 04:07:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-11-19 04:07:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2608695652173914) internal successors, (145), 125 states have internal predecessors, (145), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:07:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 171 transitions. [2021-11-19 04:07:07,136 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 171 transitions. Word has length 61 [2021-11-19 04:07:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:07,137 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 171 transitions. [2021-11-19 04:07:07,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 04:07:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 171 transitions. [2021-11-19 04:07:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:07:07,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:07,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:07,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-19 04:07:07,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:07,347 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:07,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:07,347 INFO L85 PathProgramCache]: Analyzing trace with hash -754661789, now seen corresponding path program 1 times [2021-11-19 04:07:07,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:07,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050076291] [2021-11-19 04:07:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:07,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:07,368 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:07:07,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324579907] [2021-11-19 04:07:07,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:07,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:07,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:07,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:07,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:07:07,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 04:07:07,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:07:07,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:07:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:07:07,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:07,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050076291] [2021-11-19 04:07:07,974 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:07:07,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324579907] [2021-11-19 04:07:07,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324579907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:07:07,974 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:07:07,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-19 04:07:07,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178245823] [2021-11-19 04:07:07,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:07:07,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:07:07,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:07,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:07:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:07:07,979 INFO L87 Difference]: Start difference. First operand 131 states and 171 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2021-11-19 04:07:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:08,065 INFO L93 Difference]: Finished difference Result 441 states and 563 transitions. [2021-11-19 04:07:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:07:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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 61 [2021-11-19 04:07:08,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:08,073 INFO L225 Difference]: With dead ends: 441 [2021-11-19 04:07:08,073 INFO L226 Difference]: Without dead ends: 410 [2021-11-19 04:07:08,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:07:08,080 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 400 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:08,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 730 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:07:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-19 04:07:08,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-19 04:07:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 385 states have (on average 1.2103896103896103) internal successors, (466), 395 states have internal predecessors, (466), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:07:08,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 510 transitions. [2021-11-19 04:07:08,142 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 510 transitions. Word has length 61 [2021-11-19 04:07:08,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:08,144 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 510 transitions. [2021-11-19 04:07:08,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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) [2021-11-19 04:07:08,145 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 510 transitions. [2021-11-19 04:07:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-19 04:07:08,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:08,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:08,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:07:08,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:08,374 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:08,375 INFO L85 PathProgramCache]: Analyzing trace with hash -184966364, now seen corresponding path program 2 times [2021-11-19 04:07:08,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:08,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993766911] [2021-11-19 04:07:08,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:08,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:08,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:07:08,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [889172200] [2021-11-19 04:07:08,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:07:08,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:08,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:08,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:07:08,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-19 04:07:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:07:08,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-19 04:07:08,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-11-19 04:07:09,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:07:09,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993766911] [2021-11-19 04:07:09,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:07:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889172200] [2021-11-19 04:07:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889172200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:07:09,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:07:09,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:07:09,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792764321] [2021-11-19 04:07:09,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:07:09,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:07:09,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:09,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:07:09,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:07:09,908 INFO L87 Difference]: Start difference. First operand 410 states and 510 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 04:07:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:10,166 INFO L93 Difference]: Finished difference Result 762 states and 954 transitions. [2021-11-19 04:07:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:07:10,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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 214 [2021-11-19 04:07:10,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:10,171 INFO L225 Difference]: With dead ends: 762 [2021-11-19 04:07:10,171 INFO L226 Difference]: Without dead ends: 408 [2021-11-19 04:07:10,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:07:10,173 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 15 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:10,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 442 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:07:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-19 04:07:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-11-19 04:07:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 383 states have (on average 1.2088772845953002) internal successors, (463), 393 states have internal predecessors, (463), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 13 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-19 04:07:10,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 507 transitions. [2021-11-19 04:07:10,207 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 507 transitions. Word has length 214 [2021-11-19 04:07:10,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:10,208 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 507 transitions. [2021-11-19 04:07:10,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 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) [2021-11-19 04:07:10,208 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 507 transitions. [2021-11-19 04:07:10,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-11-19 04:07:10,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:10,217 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:10,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:07:10,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:10,436 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:10,437 INFO L85 PathProgramCache]: Analyzing trace with hash 242018053, now seen corresponding path program 1 times [2021-11-19 04:07:10,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:10,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926565308] [2021-11-19 04:07:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:10,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:10,469 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:07:10,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268369238] [2021-11-19 04:07:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:10,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:10,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:10,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:10,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:07:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:07:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:07:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:07:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:07:11,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:07:11,940 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 304 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:07:11,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:07:11,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926565308] [2021-11-19 04:07:11,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:07:11,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268369238] [2021-11-19 04:07:11,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268369238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:07:11,941 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:07:11,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-19 04:07:11,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829352605] [2021-11-19 04:07:11,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:07:11,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:07:11,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:07:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:07:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:07:11,945 INFO L87 Difference]: Start difference. First operand 408 states and 507 transitions. Second operand has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:07:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:07:12,217 INFO L93 Difference]: Finished difference Result 997 states and 1241 transitions. [2021-11-19 04:07:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:07:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 229 [2021-11-19 04:07:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:07:12,227 INFO L225 Difference]: With dead ends: 997 [2021-11-19 04:07:12,227 INFO L226 Difference]: Without dead ends: 966 [2021-11-19 04:07:12,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:07:12,229 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 1375 mSDsluCounter, 1070 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1316 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:07:12,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1316 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:07:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-19 04:07:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 966. [2021-11-19 04:07:12,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 923 states have (on average 1.1971830985915493) internal successors, (1105), 933 states have internal predecessors, (1105), 40 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (40), 31 states have call predecessors, (40), 40 states have call successors, (40) [2021-11-19 04:07:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1185 transitions. [2021-11-19 04:07:12,276 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1185 transitions. Word has length 229 [2021-11-19 04:07:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:07:12,278 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 1185 transitions. [2021-11-19 04:07:12,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 36.0) internal successors, (432), 12 states have internal predecessors, (432), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:07:12,279 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1185 transitions. [2021-11-19 04:07:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-11-19 04:07:12,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:07:12,296 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:07:12,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:07:12,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:12,523 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:07:12,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:07:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1948759461, now seen corresponding path program 2 times [2021-11-19 04:07:12,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:07:12,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710739172] [2021-11-19 04:07:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:07:12,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:07:12,562 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:07:12,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39854380] [2021-11-19 04:07:12,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:07:12,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:07:12,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:07:12,564 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:07:12,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:14:27,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:14:27,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:14:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1467 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:14:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:14:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2021-11-19 04:14:29,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:14:29,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:14:29,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710739172] [2021-11-19 04:14:29,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:14:29,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39854380] [2021-11-19 04:14:29,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39854380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:14:29,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:14:29,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:14:29,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508642725] [2021-11-19 04:14:29,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:14:29,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:14:29,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:14:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:14:29,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:14:29,264 INFO L87 Difference]: Start difference. First operand 966 states and 1185 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:14:29,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:14:29,343 INFO L93 Difference]: Finished difference Result 1885 states and 2347 transitions. [2021-11-19 04:14:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:14:29,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 535 [2021-11-19 04:14:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:14:29,354 INFO L225 Difference]: With dead ends: 1885 [2021-11-19 04:14:29,354 INFO L226 Difference]: Without dead ends: 969 [2021-11-19 04:14:29,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:14:29,357 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 2 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:14:29,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 479 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:14:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2021-11-19 04:14:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 969. [2021-11-19 04:14:29,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 925 states have (on average 1.1978378378378378) internal successors, (1108), 936 states have internal predecessors, (1108), 40 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (50), 31 states have call predecessors, (50), 40 states have call successors, (50) [2021-11-19 04:14:29,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1198 transitions. [2021-11-19 04:14:29,407 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1198 transitions. Word has length 535 [2021-11-19 04:14:29,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:14:29,408 INFO L470 AbstractCegarLoop]: Abstraction has 969 states and 1198 transitions. [2021-11-19 04:14:29,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:14:29,408 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1198 transitions. [2021-11-19 04:14:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-11-19 04:14:29,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:14:29,427 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:14:29,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-19 04:14:29,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:14:29,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:14:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:14:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1197981191, now seen corresponding path program 1 times [2021-11-19 04:14:29,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:14:29,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994108807] [2021-11-19 04:14:29,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:29,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:14:29,695 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:14:29,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640612386] [2021-11-19 04:14:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:14:29,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:14:29,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:14:29,697 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:14:29,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fec842c-2e70-4f32-8765-253459d8830d/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process