./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5577528c45849c92d31dcecadbfe6524610e7683d1e420d37b6f0ce59c6c59b8 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:43:07,061 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:43:07,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:43:07,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:43:07,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:43:07,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:43:07,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:43:07,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:43:07,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:43:07,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:43:07,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:43:07,105 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:43:07,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:43:07,106 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:43:07,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:43:07,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:43:07,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:43:07,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:43:07,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:43:07,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:43:07,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:43:07,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:43:07,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:43:07,120 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:43:07,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:43:07,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:43:07,123 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:43:07,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:43:07,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:43:07,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:43:07,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:43:07,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:43:07,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:43:07,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:43:07,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:43:07,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:43:07,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:43:07,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:43:07,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:43:07,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:43:07,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:43:07,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:43:07,153 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:43:07,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:43:07,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:43:07,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:43:07,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:43:07,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:43:07,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:43:07,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:43:07,156 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:43:07,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:43:07,156 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:43:07,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:43:07,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:43:07,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:43:07,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:43:07,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:43:07,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:43:07,157 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:43:07,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:43:07,158 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:43:07,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:43:07,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:43:07,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:43:07,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:43:07,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:43:07,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:43:07,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:43:07,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:43:07,159 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:43:07,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:43:07,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:43:07,160 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:43:07,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:43:07,160 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:43:07,160 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_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5577528c45849c92d31dcecadbfe6524610e7683d1e420d37b6f0ce59c6c59b8 [2021-12-07 00:43:07,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:43:07,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:43:07,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:43:07,354 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:43:07,355 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:43:07,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i [2021-12-07 00:43:07,397 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/data/8d8705f5a/1dcb1f33ed1f4804a6f968bbcf9b06e2/FLAG7f2938b5d [2021-12-07 00:43:07,916 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:43:07,916 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i [2021-12-07 00:43:07,934 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/data/8d8705f5a/1dcb1f33ed1f4804a6f968bbcf9b06e2/FLAG7f2938b5d [2021-12-07 00:43:08,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/data/8d8705f5a/1dcb1f33ed1f4804a6f968bbcf9b06e2 [2021-12-07 00:43:08,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:43:08,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:43:08,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:43:08,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:43:08,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:43:08,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:08,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d1cbef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08, skipping insertion in model container [2021-12-07 00:43:08,388 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:08,393 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:43:08,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:43:08,718 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_caefb484-9967-430d-909a-d37f4a56c351/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i[33022,33035] [2021-12-07 00:43:08,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:43:08,857 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:43:08,880 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_caefb484-9967-430d-909a-d37f4a56c351/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test10-3.i[33022,33035] [2021-12-07 00:43:08,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:43:08,986 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:43:08,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08 WrapperNode [2021-12-07 00:43:08,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:43:08,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:43:08,988 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:43:08,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:43:08,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,108 INFO L137 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2467 [2021-12-07 00:43:09,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:43:09,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:43:09,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:43:09,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:43:09,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,183 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:43:09,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:43:09,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:43:09,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:43:09,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (1/1) ... [2021-12-07 00:43:09,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:43:09,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:09,246 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:43:09,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2021-12-07 00:43:09,275 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-07 00:43:09,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-07 00:43:09,275 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 00:43:09,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:43:09,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:43:09,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:43:09,479 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:43:09,480 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:43:10,615 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:43:10,623 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:43:10,624 INFO L301 CfgBuilder]: Removed 168 assume(true) statements. [2021-12-07 00:43:10,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:43:10 BoogieIcfgContainer [2021-12-07 00:43:10,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:43:10,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:43:10,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:43:10,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:43:10,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:43:08" (1/3) ... [2021-12-07 00:43:10,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a55dbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:43:10, skipping insertion in model container [2021-12-07 00:43:10,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:43:08" (2/3) ... [2021-12-07 00:43:10,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a55dbb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:43:10, skipping insertion in model container [2021-12-07 00:43:10,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:43:10" (3/3) ... [2021-12-07 00:43:10,632 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test10-3.i [2021-12-07 00:43:10,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:43:10,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:43:10,687 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:43:10,695 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-07 00:43:10,695 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:43:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-12-07 00:43:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:43:10,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:10,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:10,732 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1002051803, now seen corresponding path program 1 times [2021-12-07 00:43:10,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:10,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652417898] [2021-12-07 00:43:10,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:10,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:10,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:10,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652417898] [2021-12-07 00:43:10,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652417898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:10,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:10,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:43:10,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455821736] [2021-12-07 00:43:10,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:10,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:43:10,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:10,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:43:10,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:43:10,897 INFO L87 Difference]: Start difference. First operand has 478 states, 459 states have (on average 1.7124183006535947) internal successors, (786), 464 states have internal predecessors, (786), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:10,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:10,962 INFO L93 Difference]: Finished difference Result 954 states and 1634 transitions. [2021-12-07 00:43:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:43:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-07 00:43:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:10,976 INFO L225 Difference]: With dead ends: 954 [2021-12-07 00:43:10,976 INFO L226 Difference]: Without dead ends: 424 [2021-12-07 00:43:10,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:43:10,984 INFO L933 BasicCegarLoop]: 638 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:10,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-07 00:43:11,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2021-12-07 00:43:11,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 406 states have (on average 1.3251231527093597) internal successors, (538), 411 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 00:43:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 565 transitions. [2021-12-07 00:43:11,042 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 565 transitions. Word has length 13 [2021-12-07 00:43:11,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:11,043 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 565 transitions. [2021-12-07 00:43:11,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:11,043 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 565 transitions. [2021-12-07 00:43:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 00:43:11,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:11,046 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] [2021-12-07 00:43:11,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:43:11,046 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:11,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:11,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1116117503, now seen corresponding path program 1 times [2021-12-07 00:43:11,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:11,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815130641] [2021-12-07 00:43:11,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:11,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:11,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:11,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:11,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815130641] [2021-12-07 00:43:11,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815130641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:11,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:11,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:11,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073744424] [2021-12-07 00:43:11,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:11,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:11,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:11,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:11,132 INFO L87 Difference]: Start difference. First operand 424 states and 565 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:11,594 INFO L93 Difference]: Finished difference Result 745 states and 997 transitions. [2021-12-07 00:43:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-12-07 00:43:11,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:11,598 INFO L225 Difference]: With dead ends: 745 [2021-12-07 00:43:11,598 INFO L226 Difference]: Without dead ends: 499 [2021-12-07 00:43:11,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:11,601 INFO L933 BasicCegarLoop]: 536 mSDtfsCounter, 96 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1479 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:11,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 1479 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-07 00:43:11,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-12-07 00:43:11,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 426. [2021-12-07 00:43:11,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 408 states have (on average 1.3235294117647058) internal successors, (540), 413 states have internal predecessors, (540), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 00:43:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 567 transitions. [2021-12-07 00:43:11,631 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 567 transitions. Word has length 48 [2021-12-07 00:43:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:11,631 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 567 transitions. [2021-12-07 00:43:11,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 567 transitions. [2021-12-07 00:43:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 00:43:11,636 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:11,637 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:11,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:43:11,637 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1476092237, now seen corresponding path program 1 times [2021-12-07 00:43:11,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900085288] [2021-12-07 00:43:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:11,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:11,729 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:11,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903857566] [2021-12-07 00:43:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:11,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:11,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:11,731 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:11,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:43:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:12,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:43:12,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:12,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:12,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:12,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900085288] [2021-12-07 00:43:12,252 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:12,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903857566] [2021-12-07 00:43:12,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903857566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:12,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:12,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:43:12,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103953823] [2021-12-07 00:43:12,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:12,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:43:12,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:43:12,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:12,254 INFO L87 Difference]: Start difference. First operand 426 states and 567 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:12,323 INFO L93 Difference]: Finished difference Result 869 states and 1161 transitions. [2021-12-07 00:43:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:43:12,323 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 00:43:12,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:12,326 INFO L225 Difference]: With dead ends: 869 [2021-12-07 00:43:12,327 INFO L226 Difference]: Without dead ends: 447 [2021-12-07 00:43:12,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:12,329 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:12,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-07 00:43:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 446. [2021-12-07 00:43:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 428 states have (on average 1.308411214953271) internal successors, (560), 433 states have internal predecessors, (560), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 00:43:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 587 transitions. [2021-12-07 00:43:12,349 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 587 transitions. Word has length 101 [2021-12-07 00:43:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:12,350 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 587 transitions. [2021-12-07 00:43:12,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 587 transitions. [2021-12-07 00:43:12,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 00:43:12,353 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:12,353 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:12,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:43:12,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:12,555 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:12,558 INFO L85 PathProgramCache]: Analyzing trace with hash -418254159, now seen corresponding path program 1 times [2021-12-07 00:43:12,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:12,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30137209] [2021-12-07 00:43:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:12,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:12,670 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:12,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62529636] [2021-12-07 00:43:12,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:12,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:12,672 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:12,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:43:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:43:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:43:13,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:13,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30137209] [2021-12-07 00:43:13,186 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62529636] [2021-12-07 00:43:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62529636] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:13,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:13,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:43:13,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345731141] [2021-12-07 00:43:13,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:13,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:43:13,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:13,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:43:13,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:13,187 INFO L87 Difference]: Start difference. First operand 446 states and 587 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:13,232 INFO L93 Difference]: Finished difference Result 701 states and 934 transitions. [2021-12-07 00:43:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:43:13,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 00:43:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:13,235 INFO L225 Difference]: With dead ends: 701 [2021-12-07 00:43:13,235 INFO L226 Difference]: Without dead ends: 467 [2021-12-07 00:43:13,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:13,237 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 9 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:13,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1075 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-12-07 00:43:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 466. [2021-12-07 00:43:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.2946428571428572) internal successors, (580), 453 states have internal predecessors, (580), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 00:43:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 607 transitions. [2021-12-07 00:43:13,249 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 607 transitions. Word has length 101 [2021-12-07 00:43:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:13,249 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 607 transitions. [2021-12-07 00:43:13,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:13,250 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 607 transitions. [2021-12-07 00:43:13,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 00:43:13,251 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:13,251 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:13,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 00:43:13,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:13,453 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:13,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:13,454 INFO L85 PathProgramCache]: Analyzing trace with hash -637108877, now seen corresponding path program 1 times [2021-12-07 00:43:13,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:13,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219902090] [2021-12-07 00:43:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:13,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:13,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:13,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898402885] [2021-12-07 00:43:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:13,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:13,591 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:13,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:43:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:14,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:43:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:14,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:14,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:14,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219902090] [2021-12-07 00:43:14,099 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:14,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898402885] [2021-12-07 00:43:14,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898402885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:14,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:14,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:14,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293223927] [2021-12-07 00:43:14,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:14,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:14,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:14,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:14,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:14,101 INFO L87 Difference]: Start difference. First operand 466 states and 607 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:14,197 INFO L93 Difference]: Finished difference Result 1004 states and 1314 transitions. [2021-12-07 00:43:14,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:14,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 00:43:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:14,201 INFO L225 Difference]: With dead ends: 1004 [2021-12-07 00:43:14,201 INFO L226 Difference]: Without dead ends: 542 [2021-12-07 00:43:14,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:14,203 INFO L933 BasicCegarLoop]: 657 mSDtfsCounter, 506 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1460 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 [2021-12-07 00:43:14,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 1460 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:14,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-12-07 00:43:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 452. [2021-12-07 00:43:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 434 states have (on average 1.2880184331797235) internal successors, (559), 439 states have internal predecessors, (559), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 00:43:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 586 transitions. [2021-12-07 00:43:14,222 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 586 transitions. Word has length 101 [2021-12-07 00:43:14,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:14,222 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 586 transitions. [2021-12-07 00:43:14,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:14,222 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 586 transitions. [2021-12-07 00:43:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 00:43:14,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:14,224 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:14,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:43:14,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:14,426 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:14,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:14,427 INFO L85 PathProgramCache]: Analyzing trace with hash 416687617, now seen corresponding path program 1 times [2021-12-07 00:43:14,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:14,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638125225] [2021-12-07 00:43:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:14,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:14,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:14,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1203856748] [2021-12-07 00:43:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:14,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:14,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:14,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:14,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:43:14,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:14,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:43:14,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-07 00:43:15,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:15,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:15,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638125225] [2021-12-07 00:43:15,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:15,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203856748] [2021-12-07 00:43:15,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203856748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:15,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:15,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:15,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866105868] [2021-12-07 00:43:15,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:15,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:15,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:15,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:15,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:15,007 INFO L87 Difference]: Start difference. First operand 452 states and 586 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:15,071 INFO L93 Difference]: Finished difference Result 675 states and 882 transitions. [2021-12-07 00:43:15,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:15,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 00:43:15,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:15,074 INFO L225 Difference]: With dead ends: 675 [2021-12-07 00:43:15,074 INFO L226 Difference]: Without dead ends: 439 [2021-12-07 00:43:15,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:15,075 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 287 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:15,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 1308 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-12-07 00:43:15,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 438. [2021-12-07 00:43:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 420 states have (on average 1.2809523809523808) internal successors, (538), 425 states have internal predecessors, (538), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-07 00:43:15,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 565 transitions. [2021-12-07 00:43:15,089 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 565 transitions. Word has length 101 [2021-12-07 00:43:15,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:15,090 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 565 transitions. [2021-12-07 00:43:15,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:15,090 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 565 transitions. [2021-12-07 00:43:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-07 00:43:15,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:15,091 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:15,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:43:15,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 00:43:15,292 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:15,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash 893903923, now seen corresponding path program 1 times [2021-12-07 00:43:15,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:15,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779626332] [2021-12-07 00:43:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:15,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:15,357 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:15,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858708063] [2021-12-07 00:43:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:15,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:15,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:15,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:43:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1644 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:43:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:43:16,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:16,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:16,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779626332] [2021-12-07 00:43:16,038 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:16,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858708063] [2021-12-07 00:43:16,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858708063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:16,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:16,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:43:16,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478310756] [2021-12-07 00:43:16,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:16,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:43:16,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:43:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:16,040 INFO L87 Difference]: Start difference. First operand 438 states and 565 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:16,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:16,114 INFO L93 Difference]: Finished difference Result 1102 states and 1424 transitions. [2021-12-07 00:43:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:43:16,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-07 00:43:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:16,118 INFO L225 Difference]: With dead ends: 1102 [2021-12-07 00:43:16,118 INFO L226 Difference]: Without dead ends: 668 [2021-12-07 00:43:16,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:16,120 INFO L933 BasicCegarLoop]: 603 mSDtfsCounter, 249 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:16,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1129 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-07 00:43:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2021-12-07 00:43:16,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2792511700468019) internal successors, (820), 646 states have internal predecessors, (820), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 00:43:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 857 transitions. [2021-12-07 00:43:16,138 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 857 transitions. Word has length 101 [2021-12-07 00:43:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:16,138 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 857 transitions. [2021-12-07 00:43:16,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:43:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 857 transitions. [2021-12-07 00:43:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-07 00:43:16,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:16,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:16,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:43:16,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 00:43:16,340 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1884551189, now seen corresponding path program 1 times [2021-12-07 00:43:16,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:16,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925666774] [2021-12-07 00:43:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:16,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:16,373 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:16,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560938070] [2021-12-07 00:43:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:16,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:16,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:16,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:43:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-07 00:43:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:16,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-07 00:43:16,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-07 00:43:16,794 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 00:43:16,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-07 00:43:16,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 00:43:16,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-07 00:43:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:43:16,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:16,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:16,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925666774] [2021-12-07 00:43:16,923 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:16,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560938070] [2021-12-07 00:43:16,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560938070] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:16,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:16,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:43:16,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479603578] [2021-12-07 00:43:16,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:16,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:43:16,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:16,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:43:16,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:16,924 INFO L87 Difference]: Start difference. First operand 664 states and 857 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:17,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:17,680 INFO L93 Difference]: Finished difference Result 1238 states and 1596 transitions. [2021-12-07 00:43:17,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:43:17,680 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2021-12-07 00:43:17,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:17,684 INFO L225 Difference]: With dead ends: 1238 [2021-12-07 00:43:17,684 INFO L226 Difference]: Without dead ends: 664 [2021-12-07 00:43:17,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:43:17,686 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 95 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:17,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1855 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-07 00:43:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-12-07 00:43:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2021-12-07 00:43:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 641 states have (on average 1.2776911076443058) internal successors, (819), 646 states have internal predecessors, (819), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 00:43:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 856 transitions. [2021-12-07 00:43:17,712 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 856 transitions. Word has length 116 [2021-12-07 00:43:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 856 transitions. [2021-12-07 00:43:17,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:17,713 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 856 transitions. [2021-12-07 00:43:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 00:43:17,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:17,715 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:17,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:43:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:17,917 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:17,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash -227193184, now seen corresponding path program 1 times [2021-12-07 00:43:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:17,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156618510] [2021-12-07 00:43:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:17,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:18,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990620762] [2021-12-07 00:43:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:18,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:18,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:18,038 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:18,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-07 00:43:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 2220 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:43:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:18,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:43:18,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:18,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156618510] [2021-12-07 00:43:18,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:18,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990620762] [2021-12-07 00:43:18,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990620762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:18,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:18,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:43:18,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927668295] [2021-12-07 00:43:18,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:18,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:43:18,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:18,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:43:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:18,733 INFO L87 Difference]: Start difference. First operand 664 states and 856 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:18,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:18,772 INFO L93 Difference]: Finished difference Result 1352 states and 1753 transitions. [2021-12-07 00:43:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:43:18,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-07 00:43:18,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:18,776 INFO L225 Difference]: With dead ends: 1352 [2021-12-07 00:43:18,776 INFO L226 Difference]: Without dead ends: 706 [2021-12-07 00:43:18,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:18,778 INFO L933 BasicCegarLoop]: 531 mSDtfsCounter, 9 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:18,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 1047 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-07 00:43:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 704. [2021-12-07 00:43:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 681 states have (on average 1.261380323054332) internal successors, (859), 686 states have internal predecessors, (859), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 00:43:18,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 896 transitions. [2021-12-07 00:43:18,795 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 896 transitions. Word has length 163 [2021-12-07 00:43:18,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:18,796 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 896 transitions. [2021-12-07 00:43:18,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:18,796 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 896 transitions. [2021-12-07 00:43:18,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 00:43:18,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:18,798 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:18,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-07 00:43:18,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:18,999 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:18,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:18,999 INFO L85 PathProgramCache]: Analyzing trace with hash 2136648478, now seen corresponding path program 1 times [2021-12-07 00:43:18,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:18,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082666049] [2021-12-07 00:43:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:18,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:19,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:19,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1124801697] [2021-12-07 00:43:19,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:19,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:19,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:19,072 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:19,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-07 00:43:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:43:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:19,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:43:19,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:19,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082666049] [2021-12-07 00:43:19,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:19,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124801697] [2021-12-07 00:43:19,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124801697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:19,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:19,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:19,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358029897] [2021-12-07 00:43:19,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:19,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:19,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:19,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:19,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:19,802 INFO L87 Difference]: Start difference. First operand 704 states and 896 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:19,847 INFO L93 Difference]: Finished difference Result 1346 states and 1718 transitions. [2021-12-07 00:43:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:19,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-07 00:43:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:19,851 INFO L225 Difference]: With dead ends: 1346 [2021-12-07 00:43:19,851 INFO L226 Difference]: Without dead ends: 678 [2021-12-07 00:43:19,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:19,852 INFO L933 BasicCegarLoop]: 532 mSDtfsCounter, 492 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:19,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1099 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:19,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-07 00:43:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 676. [2021-12-07 00:43:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 653 states have (on average 1.2511485451761102) internal successors, (817), 658 states have internal predecessors, (817), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-07 00:43:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 854 transitions. [2021-12-07 00:43:19,868 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 854 transitions. Word has length 163 [2021-12-07 00:43:19,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:19,868 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 854 transitions. [2021-12-07 00:43:19,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 854 transitions. [2021-12-07 00:43:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-07 00:43:19,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:19,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:19,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-07 00:43:20,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-07 00:43:20,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1984933676, now seen corresponding path program 1 times [2021-12-07 00:43:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:20,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783550475] [2021-12-07 00:43:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:20,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:20,168 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:20,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2103751998] [2021-12-07 00:43:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:20,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:20,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:20,169 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:20,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 00:43:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:20,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 2208 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:43:20,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:43:21,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:21,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783550475] [2021-12-07 00:43:21,025 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:21,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103751998] [2021-12-07 00:43:21,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103751998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:21,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:21,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:43:21,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513955410] [2021-12-07 00:43:21,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:21,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:43:21,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:43:21,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:21,027 INFO L87 Difference]: Start difference. First operand 676 states and 854 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:21,084 INFO L93 Difference]: Finished difference Result 1533 states and 1962 transitions. [2021-12-07 00:43:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:43:21,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2021-12-07 00:43:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:21,089 INFO L225 Difference]: With dead ends: 1533 [2021-12-07 00:43:21,089 INFO L226 Difference]: Without dead ends: 915 [2021-12-07 00:43:21,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:43:21,091 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 220 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:21,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 1064 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-12-07 00:43:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 813. [2021-12-07 00:43:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 787 states have (on average 1.2617534942820838) internal successors, (993), 792 states have internal predecessors, (993), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-07 00:43:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1036 transitions. [2021-12-07 00:43:21,117 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1036 transitions. Word has length 163 [2021-12-07 00:43:21,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:21,117 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1036 transitions. [2021-12-07 00:43:21,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 00:43:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1036 transitions. [2021-12-07 00:43:21,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-12-07 00:43:21,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:21,120 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:21,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 00:43:21,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:21,322 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:21,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1090168527, now seen corresponding path program 1 times [2021-12-07 00:43:21,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:21,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831640115] [2021-12-07 00:43:21,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:21,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:21,409 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:21,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195930968] [2021-12-07 00:43:21,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:21,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:21,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:21,410 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:21,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-07 00:43:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:43:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:43:22,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:22,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831640115] [2021-12-07 00:43:22,142 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195930968] [2021-12-07 00:43:22,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195930968] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:22,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:22,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:22,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113798586] [2021-12-07 00:43:22,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:22,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:22,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:22,143 INFO L87 Difference]: Start difference. First operand 813 states and 1036 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:43:22,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:22,507 INFO L93 Difference]: Finished difference Result 1342 states and 1716 transitions. [2021-12-07 00:43:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2021-12-07 00:43:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:22,511 INFO L225 Difference]: With dead ends: 1342 [2021-12-07 00:43:22,511 INFO L226 Difference]: Without dead ends: 665 [2021-12-07 00:43:22,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:22,513 INFO L933 BasicCegarLoop]: 520 mSDtfsCounter, 835 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:22,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 644 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:43:22,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-07 00:43:22,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2021-12-07 00:43:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 644 states have (on average 1.2468944099378882) internal successors, (803), 649 states have internal predecessors, (803), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-07 00:43:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 836 transitions. [2021-12-07 00:43:22,528 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 836 transitions. Word has length 178 [2021-12-07 00:43:22,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:22,528 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 836 transitions. [2021-12-07 00:43:22,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:43:22,528 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 836 transitions. [2021-12-07 00:43:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-07 00:43:22,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:22,530 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:22,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-07 00:43:22,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-07 00:43:22,731 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:22,731 INFO L85 PathProgramCache]: Analyzing trace with hash -559500548, now seen corresponding path program 1 times [2021-12-07 00:43:22,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169048588] [2021-12-07 00:43:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:22,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:22,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:22,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584787557] [2021-12-07 00:43:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:22,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:22,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:22,778 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:22,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-07 00:43:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:23,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:43:23,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:43:24,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:43:24,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169048588] [2021-12-07 00:43:24,016 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:24,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584787557] [2021-12-07 00:43:24,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584787557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:43:24,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:43:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:43:24,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667150413] [2021-12-07 00:43:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:43:24,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:43:24,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:43:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:43:24,017 INFO L87 Difference]: Start difference. First operand 665 states and 836 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:43:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:24,056 INFO L93 Difference]: Finished difference Result 1281 states and 1624 transitions. [2021-12-07 00:43:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:43:24,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 185 [2021-12-07 00:43:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:24,059 INFO L225 Difference]: With dead ends: 1281 [2021-12-07 00:43:24,060 INFO L226 Difference]: Without dead ends: 668 [2021-12-07 00:43:24,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:43:24,061 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 2 mSDsluCounter, 1069 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1607 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1607 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:43:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-07 00:43:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 668. [2021-12-07 00:43:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 646 states have (on average 1.2476780185758514) internal successors, (806), 652 states have internal predecessors, (806), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 00:43:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 842 transitions. [2021-12-07 00:43:24,079 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 842 transitions. Word has length 185 [2021-12-07 00:43:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:24,079 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 842 transitions. [2021-12-07 00:43:24,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-07 00:43:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 842 transitions. [2021-12-07 00:43:24,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-07 00:43:24,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:24,081 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:24,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-07 00:43:24,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-07 00:43:24,282 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash 23822080, now seen corresponding path program 1 times [2021-12-07 00:43:24,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801952918] [2021-12-07 00:43:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:24,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:24,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:24,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894487319] [2021-12-07 00:43:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:24,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:24,365 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:24,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-07 00:43:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:43:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 00:43:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:43:25,462 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-07 00:43:25,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:43:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-07 00:43:25,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:43:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801952918] [2021-12-07 00:43:25,659 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:43:25,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894487319] [2021-12-07 00:43:25,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894487319] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:43:25,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:43:25,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 00:43:25,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997639131] [2021-12-07 00:43:25,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:43:25,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:43:25,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:43:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:43:25,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:43:25,661 INFO L87 Difference]: Start difference. First operand 668 states and 842 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 00:43:25,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:43:25,779 INFO L93 Difference]: Finished difference Result 1295 states and 1650 transitions. [2021-12-07 00:43:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-07 00:43:25,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) Word has length 189 [2021-12-07 00:43:25,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:43:25,783 INFO L225 Difference]: With dead ends: 1295 [2021-12-07 00:43:25,783 INFO L226 Difference]: Without dead ends: 679 [2021-12-07 00:43:25,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:43:25,785 INFO L933 BasicCegarLoop]: 538 mSDtfsCounter, 14 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2139 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:43:25,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:43:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-07 00:43:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2021-12-07 00:43:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 654 states have (on average 1.253822629969419) internal successors, (820), 660 states have internal predecessors, (820), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 00:43:25,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 856 transitions. [2021-12-07 00:43:25,806 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 856 transitions. Word has length 189 [2021-12-07 00:43:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:43:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 856 transitions. [2021-12-07 00:43:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 8 states have internal predecessors, (179), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 1 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-07 00:43:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 856 transitions. [2021-12-07 00:43:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-07 00:43:25,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:43:25,808 INFO L514 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:43:25,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-07 00:43:26,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:43:26,010 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:43:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:43:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -323402500, now seen corresponding path program 2 times [2021-12-07 00:43:26,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:43:26,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391091866] [2021-12-07 00:43:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:43:26,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:43:26,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:43:26,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626192362] [2021-12-07 00:43:26,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:43:26,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:43:26,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:43:26,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:43:26,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-07 00:49:16,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:49:16,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:49:17,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 00:49:17,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:49:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 81 proven. 25 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-07 00:49:17,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:49:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-07 00:49:17,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:49:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391091866] [2021-12-07 00:49:17,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 00:49:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626192362] [2021-12-07 00:49:17,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626192362] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:49:17,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:49:17,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-12-07 00:49:17,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315639861] [2021-12-07 00:49:17,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:49:17,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 00:49:17,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:49:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 00:49:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:49:17,552 INFO L87 Difference]: Start difference. First operand 677 states and 856 transitions. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:49:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:49:17,942 INFO L93 Difference]: Finished difference Result 1318 states and 1695 transitions. [2021-12-07 00:49:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 00:49:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 197 [2021-12-07 00:49:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:49:17,947 INFO L225 Difference]: With dead ends: 1318 [2021-12-07 00:49:17,947 INFO L226 Difference]: Without dead ends: 694 [2021-12-07 00:49:17,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2021-12-07 00:49:17,949 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 66 mSDsluCounter, 3183 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 3720 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:49:17,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 3720 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:49:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-12-07 00:49:17,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 683. [2021-12-07 00:49:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 660 states have (on average 1.2575757575757576) internal successors, (830), 666 states have internal predecessors, (830), 17 states have call successors, (17), 4 states have call predecessors, (17), 5 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2021-12-07 00:49:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 866 transitions. [2021-12-07 00:49:17,975 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 866 transitions. Word has length 197 [2021-12-07 00:49:17,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:49:17,976 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 866 transitions. [2021-12-07 00:49:17,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 2 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-07 00:49:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 866 transitions. [2021-12-07 00:49:17,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-07 00:49:17,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:49:17,978 INFO L514 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:49:18,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-07 00:49:18,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:18,179 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:49:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:49:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1217656828, now seen corresponding path program 3 times [2021-12-07 00:49:18,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:49:18,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113715179] [2021-12-07 00:49:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:49:18,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:49:18,241 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-07 00:49:18,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120852667] [2021-12-07 00:49:18,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 00:49:18,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:49:18,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:49:18,242 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:49:18,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_caefb484-9967-430d-909a-d37f4a56c351/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process