./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e40af029af23d5cbf5d8bd74acfdc7af42526c81be3e447d3e43ec16d52857d1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:36:21,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:36:21,138 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:36:21,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:36:21,178 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:36:21,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:36:21,181 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:36:21,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:36:21,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:36:21,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:36:21,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:36:21,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:36:21,191 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:36:21,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:36:21,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:36:21,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:36:21,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:36:21,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:36:21,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:36:21,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:36:21,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:36:21,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:36:21,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:36:21,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:36:21,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:36:21,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:36:21,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:36:21,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:36:21,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:36:21,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:36:21,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:36:21,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:36:21,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:36:21,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:36:21,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:36:21,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:36:21,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:36:21,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:36:21,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:36:21,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:36:21,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:36:21,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:36:21,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:36:21,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:36:21,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:36:21,283 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:36:21,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:36:21,284 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:36:21,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:36:21,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:36:21,285 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:36:21,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:36:21,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:36:21,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:36:21,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:36:21,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:36:21,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:36:21,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:36:21,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:36:21,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:36:21,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:36:21,289 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:36:21,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:36:21,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:36:21,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:36:21,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:36:21,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:36:21,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:36:21,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:36:21,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:36:21,291 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:36:21,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:36:21,293 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:36:21,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:36:21,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:36:21,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:36:21,294 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_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e40af029af23d5cbf5d8bd74acfdc7af42526c81be3e447d3e43ec16d52857d1 [2021-11-19 04:36:21,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:36:21,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:36:21,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:36:21,580 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:36:21,581 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:36:21,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c [2021-11-19 04:36:21,652 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/data/a9dc3a4f2/78dee934ce9e4a2da3bbac67470f54db/FLAG149d0c079 [2021-11-19 04:36:22,099 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:36:22,100 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c [2021-11-19 04:36:22,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/data/a9dc3a4f2/78dee934ce9e4a2da3bbac67470f54db/FLAG149d0c079 [2021-11-19 04:36:22,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/data/a9dc3a4f2/78dee934ce9e4a2da3bbac67470f54db [2021-11-19 04:36:22,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:36:22,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:36:22,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:36:22,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:36:22,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:36:22,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bd6d49a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22, skipping insertion in model container [2021-11-19 04:36:22,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:36:22,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:36:22,722 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_4a2e18da-7820-4f62-bba7-da56d06df12e/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c[458,471] [2021-11-19 04:36:22,740 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:36:22,749 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:36:22,761 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_4a2e18da-7820-4f62-bba7-da56d06df12e/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_unwindbound100.c[458,471] [2021-11-19 04:36:22,769 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:36:22,783 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:36:22,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22 WrapperNode [2021-11-19 04:36:22,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:36:22,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:36:22,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:36:22,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:36:22,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,800 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,818 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2021-11-19 04:36:22,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:36:22,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:36:22,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:36:22,820 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:36:22,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,837 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:36:22,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:36:22,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:36:22,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:36:22,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (1/1) ... [2021-11-19 04:36:22,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:36:22,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:22,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:36:22,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:36:22,920 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:36:22,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:36:22,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:36:22,921 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:36:22,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-19 04:36:22,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-19 04:36:22,985 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:36:22,987 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:36:23,105 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:36:23,111 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:36:23,111 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 04:36:23,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:36:23 BoogieIcfgContainer [2021-11-19 04:36:23,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:36:23,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:36:23,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:36:23,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:36:23,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:36:22" (1/3) ... [2021-11-19 04:36:23,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21af7ce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:36:23, skipping insertion in model container [2021-11-19 04:36:23,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:36:22" (2/3) ... [2021-11-19 04:36:23,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21af7ce9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:36:23, skipping insertion in model container [2021-11-19 04:36:23,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:36:23" (3/3) ... [2021-11-19 04:36:23,123 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound100.c [2021-11-19 04:36:23,128 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:36:23,129 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:36:23,179 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:36:23,187 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:36:23,187 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:36:23,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:36:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 04:36:23,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:23,210 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:23,210 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:23,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:23,216 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2021-11-19 04:36:23,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:23,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873693798] [2021-11-19 04:36:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:23,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:23,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:23,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873693798] [2021-11-19 04:36:23,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873693798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:23,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:23,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:36:23,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674194667] [2021-11-19 04:36:23,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:23,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:36:23,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:23,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:36:23,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:36:23,408 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:36:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:23,428 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-11-19 04:36:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:36:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-19 04:36:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:23,451 INFO L225 Difference]: With dead ends: 37 [2021-11-19 04:36:23,451 INFO L226 Difference]: Without dead ends: 16 [2021-11-19 04:36:23,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:36:23,473 INFO L933 BasicCegarLoop]: 23 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, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:23,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:36:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-19 04:36:23,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-19 04:36:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:36:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-19 04:36:23,526 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2021-11-19 04:36:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:23,526 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-19 04:36:23,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:36:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-19 04:36:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:36:23,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:23,529 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:23,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:36:23,530 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:23,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2021-11-19 04:36:23,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:23,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992952274] [2021-11-19 04:36:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:23,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:23,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:23,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992952274] [2021-11-19 04:36:23,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992952274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:23,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:23,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:36:23,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048145205] [2021-11-19 04:36:23,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:23,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:36:23,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:36:23,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:36:23,671 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:36:23,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:23,713 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-19 04:36:23,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:36:23,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 04:36:23,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:23,714 INFO L225 Difference]: With dead ends: 26 [2021-11-19 04:36:23,715 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 04:36:23,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:36:23,717 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:23,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:36:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 04:36:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 04:36:23,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:36:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-19 04:36:23,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2021-11-19 04:36:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:23,723 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-19 04:36:23,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:36:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-19 04:36:23,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:36:23,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:23,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:23,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:36:23,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:23,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2021-11-19 04:36:23,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:23,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931435697] [2021-11-19 04:36:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:23,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:23,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:23,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [305012630] [2021-11-19 04:36:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:23,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:23,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:23,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:36:23,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:36:23,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:24,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:36:24,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:24,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931435697] [2021-11-19 04:36:24,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:24,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305012630] [2021-11-19 04:36:24,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305012630] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:36:24,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:36:24,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:36:24,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007215137] [2021-11-19 04:36:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:24,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:36:24,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:36:24,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:36:24,023 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:36:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:24,101 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-11-19 04:36:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:36:24,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-19 04:36:24,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:24,103 INFO L225 Difference]: With dead ends: 28 [2021-11-19 04:36:24,103 INFO L226 Difference]: Without dead ends: 24 [2021-11-19 04:36:24,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:36:24,105 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:24,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 62 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:36:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-19 04:36:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-19 04:36:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:36:24,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-19 04:36:24,114 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2021-11-19 04:36:24,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:24,114 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-19 04:36:24,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 04:36:24,115 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-19 04:36:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:36:24,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:24,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:24,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:24,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:24,344 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:24,345 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2021-11-19 04:36:24,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:24,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788232579] [2021-11-19 04:36:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:24,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:24,358 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:24,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1323009504] [2021-11-19 04:36:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:24,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:24,363 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:24,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:36:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:24,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:36:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:24,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:24,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:24,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:24,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788232579] [2021-11-19 04:36:24,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:24,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323009504] [2021-11-19 04:36:24,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323009504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:36:24,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:36:24,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-11-19 04:36:24,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700601842] [2021-11-19 04:36:24,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:24,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:36:24,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:24,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:36:24,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:36:24,652 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:36:25,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:25,043 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-11-19 04:36:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:36:25,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-19 04:36:25,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:25,046 INFO L225 Difference]: With dead ends: 58 [2021-11-19 04:36:25,046 INFO L226 Difference]: Without dead ends: 50 [2021-11-19 04:36:25,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:36:25,048 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:25,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 93 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:36:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-19 04:36:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-19 04:36:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:36:25,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-19 04:36:25,076 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2021-11-19 04:36:25,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:25,076 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-19 04:36:25,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:36:25,077 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-19 04:36:25,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-19 04:36:25,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:25,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:25,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:25,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:25,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:25,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:25,279 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2021-11-19 04:36:25,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:25,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588795420] [2021-11-19 04:36:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:25,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:25,288 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:25,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035535695] [2021-11-19 04:36:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:25,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:25,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:25,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:25,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:36:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:36:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:36:25,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:36:25,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:25,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588795420] [2021-11-19 04:36:25,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:25,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035535695] [2021-11-19 04:36:25,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035535695] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:25,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:25,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-19 04:36:25,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530888010] [2021-11-19 04:36:25,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:36:25,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:36:25,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:36:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:36:25,590 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:36:25,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:25,656 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-19 04:36:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 04:36:25,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-19 04:36:25,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:25,661 INFO L225 Difference]: With dead ends: 60 [2021-11-19 04:36:25,664 INFO L226 Difference]: Without dead ends: 52 [2021-11-19 04:36:25,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:36:25,667 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:25,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:36:25,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-19 04:36:25,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2021-11-19 04:36:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:36:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-11-19 04:36:25,695 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2021-11-19 04:36:25,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:25,696 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-11-19 04:36:25,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:36:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-11-19 04:36:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-19 04:36:25,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:25,698 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:25,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:25,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:25,903 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2021-11-19 04:36:25,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:25,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72919942] [2021-11-19 04:36:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:25,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:25,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:25,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564538771] [2021-11-19 04:36:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:25,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:25,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:25,944 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:25,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:36:26,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:26,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-19 04:36:26,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:36:26,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:26,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:26,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72919942] [2021-11-19 04:36:26,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:26,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564538771] [2021-11-19 04:36:26,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564538771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:26,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:26,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-19 04:36:26,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068823129] [2021-11-19 04:36:26,501 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:26,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:36:26,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:36:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-11-19 04:36:26,503 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:36:26,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:26,574 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2021-11-19 04:36:26,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:36:26,575 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-11-19 04:36:26,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:26,577 INFO L225 Difference]: With dead ends: 51 [2021-11-19 04:36:26,578 INFO L226 Difference]: Without dead ends: 45 [2021-11-19 04:36:26,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:36:26,579 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:36:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-19 04:36:26,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-19 04:36:26,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:36:26,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-19 04:36:26,592 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2021-11-19 04:36:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:26,592 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-19 04:36:26,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:36:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-19 04:36:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 04:36:26,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:26,594 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:26,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:26,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:26,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2021-11-19 04:36:26,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:26,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635737319] [2021-11-19 04:36:26,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:26,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:26,825 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:26,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069029976] [2021-11-19 04:36:26,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:36:26,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:26,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:26,844 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:26,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:36:26,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:36:26,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:26,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-19 04:36:26,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 04:36:27,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:27,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:27,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635737319] [2021-11-19 04:36:27,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:27,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069029976] [2021-11-19 04:36:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069029976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:27,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:27,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-11-19 04:36:27,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232595527] [2021-11-19 04:36:27,413 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:27,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:36:27,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:27,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:36:27,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:36:27,415 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:36:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:27,511 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-11-19 04:36:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:36:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2021-11-19 04:36:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:27,513 INFO L225 Difference]: With dead ends: 50 [2021-11-19 04:36:27,514 INFO L226 Difference]: Without dead ends: 44 [2021-11-19 04:36:27,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:36:27,518 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:27,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 150 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:36:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-19 04:36:27,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-19 04:36:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:36:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-11-19 04:36:27,531 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2021-11-19 04:36:27,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:27,532 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-11-19 04:36:27,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-19 04:36:27,532 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-11-19 04:36:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:36:27,533 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:27,533 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:27,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:27,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:27,737 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2021-11-19 04:36:27,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:27,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847326168] [2021-11-19 04:36:27,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:27,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:27,745 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:27,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194620380] [2021-11-19 04:36:27,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:36:27,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:27,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:27,749 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:36:28,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 04:36:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:28,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 04:36:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 04:36:28,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:29,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:29,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847326168] [2021-11-19 04:36:29,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:29,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194620380] [2021-11-19 04:36:29,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194620380] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:29,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:29,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-19 04:36:29,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065608219] [2021-11-19 04:36:29,075 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:29,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:36:29,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:29,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:36:29,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:36:29,077 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:36:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:29,209 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-11-19 04:36:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:36:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 45 [2021-11-19 04:36:29,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:29,210 INFO L225 Difference]: With dead ends: 52 [2021-11-19 04:36:29,210 INFO L226 Difference]: Without dead ends: 46 [2021-11-19 04:36:29,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:36:29,212 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:29,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:36:29,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-19 04:36:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-19 04:36:29,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:36:29,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-11-19 04:36:29,226 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 45 [2021-11-19 04:36:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:29,227 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-11-19 04:36:29,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:36:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-11-19 04:36:29,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-19 04:36:29,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:29,231 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:29,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:29,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 04:36:29,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:29,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:29,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2021-11-19 04:36:29,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:29,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949975687] [2021-11-19 04:36:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:29,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:29,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:29,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679796159] [2021-11-19 04:36:29,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:29,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:29,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:29,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:29,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:36:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:29,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:36:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:36:29,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-19 04:36:29,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:29,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949975687] [2021-11-19 04:36:29,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:29,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679796159] [2021-11-19 04:36:29,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679796159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:36:29,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:36:29,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-19 04:36:29,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15628001] [2021-11-19 04:36:29,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:29,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:36:29,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:29,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:36:29,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:36:29,913 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-19 04:36:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:30,182 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-11-19 04:36:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-19 04:36:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2021-11-19 04:36:30,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:30,185 INFO L225 Difference]: With dead ends: 132 [2021-11-19 04:36:30,185 INFO L226 Difference]: Without dead ends: 122 [2021-11-19 04:36:30,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:36:30,186 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 107 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:30,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 159 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:36:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-19 04:36:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2021-11-19 04:36:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 04:36:30,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2021-11-19 04:36:30,213 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2021-11-19 04:36:30,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:30,214 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2021-11-19 04:36:30,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-19 04:36:30,215 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2021-11-19 04:36:30,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-19 04:36:30,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:30,218 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:30,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:30,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:30,430 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:30,431 INFO L85 PathProgramCache]: Analyzing trace with hash 348710830, now seen corresponding path program 4 times [2021-11-19 04:36:30,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:30,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603793836] [2021-11-19 04:36:30,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:30,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:30,437 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:30,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239470721] [2021-11-19 04:36:30,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:36:30,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:30,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:30,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:30,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:36:30,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:36:30,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:30,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 04:36:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-19 04:36:30,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:31,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:31,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603793836] [2021-11-19 04:36:31,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:31,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239470721] [2021-11-19 04:36:31,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239470721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:31,049 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:31,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-11-19 04:36:31,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158647717] [2021-11-19 04:36:31,050 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:31,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 04:36:31,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 04:36:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:36:31,051 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:36:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:31,191 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2021-11-19 04:36:31,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:36:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2021-11-19 04:36:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:31,193 INFO L225 Difference]: With dead ends: 102 [2021-11-19 04:36:31,193 INFO L226 Difference]: Without dead ends: 96 [2021-11-19 04:36:31,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:36:31,194 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:31,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 246 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:36:31,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-19 04:36:31,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-19 04:36:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-19 04:36:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-11-19 04:36:31,212 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 53 [2021-11-19 04:36:31,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:31,213 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-11-19 04:36:31,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:36:31,213 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-11-19 04:36:31,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:36:31,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:31,214 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:31,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:31,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:36:31,433 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:31,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:31,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 5 times [2021-11-19 04:36:31,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:31,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896707682] [2021-11-19 04:36:31,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:31,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:31,441 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:31,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1770476481] [2021-11-19 04:36:31,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:36:31,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:31,443 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:31,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:36:32,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-19 04:36:32,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:32,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:36:32,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-19 04:36:32,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:32,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:32,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896707682] [2021-11-19 04:36:32,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:32,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770476481] [2021-11-19 04:36:32,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770476481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:32,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:32,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-11-19 04:36:32,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60609826] [2021-11-19 04:36:32,790 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:32,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:36:32,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:32,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:36:32,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:36:32,792 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:36:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:32,985 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-11-19 04:36:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:36:32,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2021-11-19 04:36:32,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:32,987 INFO L225 Difference]: With dead ends: 101 [2021-11-19 04:36:32,987 INFO L226 Difference]: Without dead ends: 95 [2021-11-19 04:36:32,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:36:32,988 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:32,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 303 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:36:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-19 04:36:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-19 04:36:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 04:36:33,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2021-11-19 04:36:33,004 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2021-11-19 04:36:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:33,005 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2021-11-19 04:36:33,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:36:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2021-11-19 04:36:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:36:33,007 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:33,007 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:33,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:33,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-19 04:36:33,213 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:33,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:33,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 6 times [2021-11-19 04:36:33,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:33,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107253280] [2021-11-19 04:36:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:33,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:33,220 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:33,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240035781] [2021-11-19 04:36:33,221 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:36:33,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:33,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:33,224 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:33,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:36:33,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-19 04:36:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:33,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 04:36:33,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-19 04:36:34,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:34,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:34,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107253280] [2021-11-19 04:36:34,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:34,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240035781] [2021-11-19 04:36:34,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240035781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:34,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:34,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-19 04:36:34,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137827419] [2021-11-19 04:36:34,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:34,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:36:34,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:36:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:36:34,282 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 04:36:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:34,484 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-19 04:36:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:36:34,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2021-11-19 04:36:34,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:34,486 INFO L225 Difference]: With dead ends: 100 [2021-11-19 04:36:34,486 INFO L226 Difference]: Without dead ends: 94 [2021-11-19 04:36:34,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:36:34,487 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:34,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 366 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:36:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-19 04:36:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-19 04:36:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:36:34,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-11-19 04:36:34,519 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2021-11-19 04:36:34,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:34,520 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-11-19 04:36:34,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-19 04:36:34,520 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-11-19 04:36:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-19 04:36:34,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:34,522 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:34,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:34,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:34,727 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:34,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 7 times [2021-11-19 04:36:34,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:34,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302490009] [2021-11-19 04:36:34,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:34,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:34,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:34,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347870819] [2021-11-19 04:36:34,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:36:34,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:34,737 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:34,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:36:35,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:36:35,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 04:36:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-19 04:36:35,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:36,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:36,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302490009] [2021-11-19 04:36:36,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:36,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347870819] [2021-11-19 04:36:36,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347870819] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:36,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:36,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-19 04:36:36,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777597680] [2021-11-19 04:36:36,122 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:36,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:36:36,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:36:36,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:36:36,124 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:36:36,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:36,349 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-11-19 04:36:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:36:36,349 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2021-11-19 04:36:36,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:36,351 INFO L225 Difference]: With dead ends: 99 [2021-11-19 04:36:36,351 INFO L226 Difference]: Without dead ends: 93 [2021-11-19 04:36:36,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:36:36,352 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 2 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:36,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 435 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:36:36,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-19 04:36:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-19 04:36:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:36:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2021-11-19 04:36:36,384 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2021-11-19 04:36:36,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:36,385 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2021-11-19 04:36:36,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-19 04:36:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2021-11-19 04:36:36,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 04:36:36,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:36,389 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:36,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:36,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:36,595 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:36,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 8 times [2021-11-19 04:36:36,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:36,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420075209] [2021-11-19 04:36:36,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:36,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:36,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:36,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925965033] [2021-11-19 04:36:36,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:36:36,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:36,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:36,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:36,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:36:37,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:36:37,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 04:36:37,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-11-19 04:36:37,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:38,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:38,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420075209] [2021-11-19 04:36:38,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:38,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925965033] [2021-11-19 04:36:38,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925965033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:38,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:38,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-19 04:36:38,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789555626] [2021-11-19 04:36:38,019 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:38,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:36:38,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:36:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:36:38,021 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 04:36:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:38,305 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2021-11-19 04:36:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:36:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2021-11-19 04:36:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:38,307 INFO L225 Difference]: With dead ends: 98 [2021-11-19 04:36:38,307 INFO L226 Difference]: Without dead ends: 92 [2021-11-19 04:36:38,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:36:38,308 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:38,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 510 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:36:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-19 04:36:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-11-19 04:36:38,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 04:36:38,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2021-11-19 04:36:38,323 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2021-11-19 04:36:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:38,324 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2021-11-19 04:36:38,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-19 04:36:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2021-11-19 04:36:38,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-19 04:36:38,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:38,325 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:38,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-19 04:36:38,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:38,531 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:38,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 9 times [2021-11-19 04:36:38,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:38,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829426307] [2021-11-19 04:36:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:38,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:38,545 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:38,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182766291] [2021-11-19 04:36:38,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:36:38,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:38,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:38,547 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:38,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:36:41,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-19 04:36:41,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:41,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 04:36:41,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:41,663 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 22 proven. 180 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-19 04:36:41,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:41,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:41,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829426307] [2021-11-19 04:36:41,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:41,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182766291] [2021-11-19 04:36:41,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182766291] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:41,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:41,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-19 04:36:41,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416039356] [2021-11-19 04:36:41,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:41,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:36:41,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:41,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:36:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-19 04:36:41,880 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 04:36:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:42,149 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2021-11-19 04:36:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:36:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 93 [2021-11-19 04:36:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:42,150 INFO L225 Difference]: With dead ends: 100 [2021-11-19 04:36:42,151 INFO L226 Difference]: Without dead ends: 94 [2021-11-19 04:36:42,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-19 04:36:42,152 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:42,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 591 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:36:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-19 04:36:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-19 04:36:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:36:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2021-11-19 04:36:42,162 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 93 [2021-11-19 04:36:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:42,163 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2021-11-19 04:36:42,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-19 04:36:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2021-11-19 04:36:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 04:36:42,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:42,165 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:42,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-19 04:36:42,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:36:42,372 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:42,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2021-11-19 04:36:42,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:42,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691621325] [2021-11-19 04:36:42,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:42,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:42,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:42,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498845577] [2021-11-19 04:36:42,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:36:42,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:42,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:42,389 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:42,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:36:42,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:36:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-19 04:36:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-19 04:36:42,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-19 04:36:43,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:43,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691621325] [2021-11-19 04:36:43,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:43,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498845577] [2021-11-19 04:36:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498845577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:36:43,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:36:43,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-11-19 04:36:43,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100225285] [2021-11-19 04:36:43,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:43,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 04:36:43,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:43,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 04:36:43,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:36:43,219 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-19 04:36:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:43,878 INFO L93 Difference]: Finished difference Result 264 states and 288 transitions. [2021-11-19 04:36:43,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 04:36:43,879 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 95 [2021-11-19 04:36:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:43,881 INFO L225 Difference]: With dead ends: 264 [2021-11-19 04:36:43,881 INFO L226 Difference]: Without dead ends: 254 [2021-11-19 04:36:43,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 04:36:43,883 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 350 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:43,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 285 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:36:43,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-19 04:36:43,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 199. [2021-11-19 04:36:43,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 141 states have (on average 1.0921985815602837) internal successors, (154), 152 states have internal predecessors, (154), 35 states have call successors, (35), 23 states have call predecessors, (35), 22 states have return successors, (34), 23 states have call predecessors, (34), 34 states have call successors, (34) [2021-11-19 04:36:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 223 transitions. [2021-11-19 04:36:43,908 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 223 transitions. Word has length 95 [2021-11-19 04:36:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:43,909 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 223 transitions. [2021-11-19 04:36:43,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-19 04:36:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 223 transitions. [2021-11-19 04:36:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-19 04:36:43,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:43,930 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:43,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:44,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:36:44,130 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:44,131 INFO L85 PathProgramCache]: Analyzing trace with hash -939543350, now seen corresponding path program 10 times [2021-11-19 04:36:44,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:44,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134359699] [2021-11-19 04:36:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:44,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:44,139 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:44,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159949465] [2021-11-19 04:36:44,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:36:44,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:44,153 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:44,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 04:36:44,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:36:44,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:36:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-19 04:36:44,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:36:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 24 proven. 220 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-19 04:36:44,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:36:46,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:36:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134359699] [2021-11-19 04:36:46,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:36:46,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159949465] [2021-11-19 04:36:46,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159949465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:36:46,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:36:46,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-19 04:36:46,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004090539] [2021-11-19 04:36:46,155 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:36:46,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-19 04:36:46,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:36:46,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-19 04:36:46,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:36:46,157 INFO L87 Difference]: Start difference. First operand 199 states and 223 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:36:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:36:46,573 INFO L93 Difference]: Finished difference Result 204 states and 227 transitions. [2021-11-19 04:36:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 04:36:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 101 [2021-11-19 04:36:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:36:46,575 INFO L225 Difference]: With dead ends: 204 [2021-11-19 04:36:46,575 INFO L226 Difference]: Without dead ends: 198 [2021-11-19 04:36:46,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:36:46,580 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 2 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:36:46,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 678 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:36:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-19 04:36:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-11-19 04:36:46,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 141 states have (on average 1.0851063829787233) internal successors, (153), 151 states have internal predecessors, (153), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (33), 23 states have call predecessors, (33), 33 states have call successors, (33) [2021-11-19 04:36:46,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2021-11-19 04:36:46,618 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 101 [2021-11-19 04:36:46,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:36:46,618 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2021-11-19 04:36:46,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-11-19 04:36:46,619 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2021-11-19 04:36:46,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-19 04:36:46,620 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:36:46,621 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:36:46,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 04:36:46,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-19 04:36:46,840 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:36:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:36:46,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1584846500, now seen corresponding path program 11 times [2021-11-19 04:36:46,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:36:46,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548566097] [2021-11-19 04:36:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:36:46,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:36:46,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:36:46,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923314124] [2021-11-19 04:36:46,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:36:46,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:36:46,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:36:46,857 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:36:46,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 04:37:08,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-19 04:37:08,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:37:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 04:37:08,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:37:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-19 04:37:08,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:37:10,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:37:10,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548566097] [2021-11-19 04:37:10,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:37:10,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923314124] [2021-11-19 04:37:10,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923314124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:37:10,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:37:10,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-19 04:37:10,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849827180] [2021-11-19 04:37:10,120 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:37:10,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:37:10,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:37:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:37:10,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=640, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:37:10,122 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:37:10,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:37:10,561 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2021-11-19 04:37:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:37:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2021-11-19 04:37:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:37:10,563 INFO L225 Difference]: With dead ends: 203 [2021-11-19 04:37:10,563 INFO L226 Difference]: Without dead ends: 197 [2021-11-19 04:37:10,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:37:10,565 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:37:10,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 771 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:37:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-19 04:37:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-11-19 04:37:10,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 150 states have internal predecessors, (152), 33 states have call successors, (33), 23 states have call predecessors, (33), 22 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2021-11-19 04:37:10,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 217 transitions. [2021-11-19 04:37:10,590 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 217 transitions. Word has length 109 [2021-11-19 04:37:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:37:10,590 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 217 transitions. [2021-11-19 04:37:10,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-19 04:37:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 217 transitions. [2021-11-19 04:37:10,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-19 04:37:10,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:37:10,593 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:37:10,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 04:37:10,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-19 04:37:10,813 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:37:10,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:37:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1568440706, now seen corresponding path program 12 times [2021-11-19 04:37:10,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:37:10,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066873461] [2021-11-19 04:37:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:37:10,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:37:10,822 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:37:10,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429415704] [2021-11-19 04:37:10,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:37:10,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:37:10,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:37:10,835 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:37:10,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 04:38:03,435 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-19 04:38:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:38:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-19 04:38:03,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:38:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 28 proven. 312 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-19 04:38:04,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:38:04,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:38:04,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066873461] [2021-11-19 04:38:04,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:38:04,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429415704] [2021-11-19 04:38:04,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429415704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:38:04,980 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:38:04,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-19 04:38:04,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262333451] [2021-11-19 04:38:04,981 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:38:04,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:38:04,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:38:04,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:38:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:38:04,984 INFO L87 Difference]: Start difference. First operand 197 states and 217 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 04:38:05,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:38:05,439 INFO L93 Difference]: Finished difference Result 202 states and 221 transitions. [2021-11-19 04:38:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:38:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 117 [2021-11-19 04:38:05,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:38:05,444 INFO L225 Difference]: With dead ends: 202 [2021-11-19 04:38:05,444 INFO L226 Difference]: Without dead ends: 196 [2021-11-19 04:38:05,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-11-19 04:38:05,445 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:38:05,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 870 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:38:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-19 04:38:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2021-11-19 04:38:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 141 states have (on average 1.070921985815603) internal successors, (151), 149 states have internal predecessors, (151), 32 states have call successors, (32), 23 states have call predecessors, (32), 22 states have return successors, (31), 23 states have call predecessors, (31), 31 states have call successors, (31) [2021-11-19 04:38:05,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 214 transitions. [2021-11-19 04:38:05,466 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 214 transitions. Word has length 117 [2021-11-19 04:38:05,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:38:05,467 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 214 transitions. [2021-11-19 04:38:05,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-19 04:38:05,468 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 214 transitions. [2021-11-19 04:38:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 04:38:05,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:38:05,471 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:38:05,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 04:38:05,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:38:05,680 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:38:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:38:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash 20950104, now seen corresponding path program 13 times [2021-11-19 04:38:05,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:38:05,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843695229] [2021-11-19 04:38:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:38:05,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:38:05,686 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:38:05,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958892283] [2021-11-19 04:38:05,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:38:05,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:38:05,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:38:05,691 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:38:05,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 04:38:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:38:07,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 04:38:07,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:38:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 30 proven. 364 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-11-19 04:38:08,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:38:08,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:38:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843695229] [2021-11-19 04:38:08,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:38:08,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958892283] [2021-11-19 04:38:08,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958892283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:38:08,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:38:08,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-19 04:38:08,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773445771] [2021-11-19 04:38:08,292 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:38:08,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-19 04:38:08,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:38:08,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-19 04:38:08,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-11-19 04:38:08,294 INFO L87 Difference]: Start difference. First operand 196 states and 214 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-19 04:38:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:38:08,743 INFO L93 Difference]: Finished difference Result 201 states and 218 transitions. [2021-11-19 04:38:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 04:38:08,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 125 [2021-11-19 04:38:08,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:38:08,745 INFO L225 Difference]: With dead ends: 201 [2021-11-19 04:38:08,745 INFO L226 Difference]: Without dead ends: 195 [2021-11-19 04:38:08,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:38:08,746 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 904 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:38:08,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 975 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:38:08,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-19 04:38:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-11-19 04:38:08,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 141 states have (on average 1.0638297872340425) internal successors, (150), 148 states have internal predecessors, (150), 31 states have call successors, (31), 23 states have call predecessors, (31), 22 states have return successors, (30), 23 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-19 04:38:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 211 transitions. [2021-11-19 04:38:08,765 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 211 transitions. Word has length 125 [2021-11-19 04:38:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:38:08,765 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 211 transitions. [2021-11-19 04:38:08,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-19 04:38:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 211 transitions. [2021-11-19 04:38:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-19 04:38:08,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:38:08,768 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:38:08,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 04:38:08,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:38:08,974 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:38:08,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:38:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash 767909938, now seen corresponding path program 14 times [2021-11-19 04:38:08,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:38:08,975 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358876582] [2021-11-19 04:38:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:38:08,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:38:08,982 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:38:08,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [112579799] [2021-11-19 04:38:08,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:38:08,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:38:08,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:38:08,984 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:38:08,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 04:38:10,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:38:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:38:10,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 04:38:10,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:38:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 32 proven. 420 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-11-19 04:38:11,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:38:11,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:38:11,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358876582] [2021-11-19 04:38:11,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:38:11,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112579799] [2021-11-19 04:38:11,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112579799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:38:11,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:38:11,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-19 04:38:11,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106838617] [2021-11-19 04:38:11,618 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:38:11,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-19 04:38:11,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:38:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-19 04:38:11,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-11-19 04:38:11,620 INFO L87 Difference]: Start difference. First operand 195 states and 211 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 04:38:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:38:12,127 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-11-19 04:38:12,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 04:38:12,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 133 [2021-11-19 04:38:12,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:38:12,129 INFO L225 Difference]: With dead ends: 200 [2021-11-19 04:38:12,129 INFO L226 Difference]: Without dead ends: 194 [2021-11-19 04:38:12,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-19 04:38:12,131 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 2 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:38:12,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1086 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:38:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-19 04:38:12,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2021-11-19 04:38:12,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 141 states have (on average 1.0567375886524824) internal successors, (149), 147 states have internal predecessors, (149), 30 states have call successors, (30), 23 states have call predecessors, (30), 22 states have return successors, (29), 23 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-19 04:38:12,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 208 transitions. [2021-11-19 04:38:12,150 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 208 transitions. Word has length 133 [2021-11-19 04:38:12,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:38:12,151 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 208 transitions. [2021-11-19 04:38:12,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-19 04:38:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 208 transitions. [2021-11-19 04:38:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 04:38:12,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:38:12,153 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:38:12,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 04:38:12,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:38:12,360 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:38:12,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:38:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 556702220, now seen corresponding path program 15 times [2021-11-19 04:38:12,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:38:12,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040846039] [2021-11-19 04:38:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:38:12,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:38:12,367 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:38:12,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713059271] [2021-11-19 04:38:12,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:38:12,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:38:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:38:12,377 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:38:12,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a2e18da-7820-4f62-bba7-da56d06df12e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process