./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:10:54,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:10:54,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:10:54,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:10:54,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:10:54,061 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:10:54,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:10:54,069 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:10:54,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:10:54,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:10:54,081 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:10:54,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:10:54,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:10:54,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:10:54,090 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:10:54,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:10:54,098 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:10:54,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:10:54,105 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:10:54,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:10:54,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:10:54,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:10:54,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:10:54,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:10:54,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:10:54,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:10:54,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:10:54,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:10:54,132 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:10:54,134 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:10:54,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:10:54,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:10:54,138 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:10:54,139 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:10:54,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:10:54,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:10:54,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:10:54,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:10:54,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:10:54,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:10:54,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:10:54,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:10:54,201 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:10:54,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:10:54,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:10:54,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:10:54,206 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:10:54,206 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:10:54,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:10:54,207 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:10:54,207 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:10:54,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:10:54,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:10:54,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:10:54,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:10:54,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:10:54,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:10:54,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:10:54,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:10:54,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:10:54,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:10:54,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:10:54,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:10:54,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:10:54,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:10:54,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:10:54,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:10:54,213 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:10:54,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:10:54,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:10:54,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:10:54,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:10:54,216 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:10:54,216 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:10:54,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:10:54,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:10:54,217 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_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 76fd23ddcb7e8fff12decb053b84ed59e907e32bdbc4e822256bdb820e1311ef [2021-11-20 06:10:54,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:10:54,522 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:10:54,525 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:10:54,527 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:10:54,528 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:10:54,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-11-20 06:10:54,605 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/data/4cccf7199/68ac49cbe80645409dc2dbec2840149d/FLAGd1ece7c8a [2021-11-20 06:10:55,123 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:10:55,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c [2021-11-20 06:10:55,145 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/data/4cccf7199/68ac49cbe80645409dc2dbec2840149d/FLAGd1ece7c8a [2021-11-20 06:10:55,487 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/data/4cccf7199/68ac49cbe80645409dc2dbec2840149d [2021-11-20 06:10:55,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:10:55,492 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:10:55,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:10:55,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:10:55,498 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:10:55,498 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77b84f84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55, skipping insertion in model container [2021-11-20 06:10:55,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,508 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:10:55,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:10:55,770 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_02811ca5-b830-42e3-8fcc-f84b00963613/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-11-20 06:10:55,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:10:55,829 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:10:55,851 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_02811ca5-b830-42e3-8fcc-f84b00963613/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound10.c[490,503] [2021-11-20 06:10:55,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:10:55,899 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:10:55,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55 WrapperNode [2021-11-20 06:10:55,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:10:55,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:10:55,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:10:55,905 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:10:55,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,954 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2021-11-20 06:10:55,955 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:10:55,956 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:10:55,956 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:10:55,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:10:55,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:55,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:56,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:10:56,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:10:56,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:10:56,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:10:56,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (1/1) ... [2021-11-20 06:10:56,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:10:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:56,050 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:10:56,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:10:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:10:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:10:56,111 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:10:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:10:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:10:56,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:10:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-20 06:10:56,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-20 06:10:56,188 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:10:56,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:10:56,418 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:10:56,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:10:56,431 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:10:56,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:10:56 BoogieIcfgContainer [2021-11-20 06:10:56,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:10:56,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:10:56,436 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:10:56,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:10:56,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:10:55" (1/3) ... [2021-11-20 06:10:56,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f1da47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:10:56, skipping insertion in model container [2021-11-20 06:10:56,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:10:55" (2/3) ... [2021-11-20 06:10:56,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51f1da47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:10:56, skipping insertion in model container [2021-11-20 06:10:56,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:10:56" (3/3) ... [2021-11-20 06:10:56,445 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound10.c [2021-11-20 06:10:56,451 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:10:56,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:10:56,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:10:56,555 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:10:56,571 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:10:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-20 06:10:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:10:56,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:56,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:56,612 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2021-11-20 06:10:56,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:56,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757717224] [2021-11-20 06:10:56,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:56,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:56,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:10:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:56,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-20 06:10:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:10:56,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:56,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757717224] [2021-11-20 06:10:56,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757717224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:56,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:56,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:10:56,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408204335] [2021-11-20 06:10:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:56,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:10:56,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:56,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:10:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:10:56,989 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:10:57,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:57,024 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2021-11-20 06:10:57,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:10:57,027 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 06:10:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:57,036 INFO L225 Difference]: With dead ends: 67 [2021-11-20 06:10:57,036 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 06:10:57,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:10:57,045 INFO L933 BasicCegarLoop]: 45 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, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:57,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 06:10:57,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-20 06:10:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:10:57,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-11-20 06:10:57,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2021-11-20 06:10:57,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:57,097 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-11-20 06:10:57,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:10:57,098 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-11-20 06:10:57,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 06:10:57,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:57,100 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:57,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:10:57,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:57,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1013747788, now seen corresponding path program 1 times [2021-11-20 06:10:57,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:57,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037501494] [2021-11-20 06:10:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:57,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:57,127 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:57,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011424264] [2021-11-20 06:10:57,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:57,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:57,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:57,131 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:57,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:10:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:57,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:10:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:57,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:10:57,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:57,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:57,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037501494] [2021-11-20 06:10:57,345 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:57,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011424264] [2021-11-20 06:10:57,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011424264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:57,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:57,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:10:57,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746959854] [2021-11-20 06:10:57,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:57,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:10:57,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:10:57,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:57,351 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:57,380 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-20 06:10:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:10:57,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-20 06:10:57,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:57,383 INFO L225 Difference]: With dead ends: 40 [2021-11-20 06:10:57,383 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 06:10:57,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:10:57,386 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:57,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:57,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 06:10:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-20 06:10:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:10:57,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-11-20 06:10:57,397 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-11-20 06:10:57,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:57,415 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-11-20 06:10:57,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:57,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-11-20 06:10:57,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:10:57,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:57,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:57,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:10:57,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:57,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1341775226, now seen corresponding path program 1 times [2021-11-20 06:10:57,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:57,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872694856] [2021-11-20 06:10:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:57,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:57,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:57,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083259319] [2021-11-20 06:10:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:57,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:57,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:57,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:57,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:10:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:57,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:57,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:10:57,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:57,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:57,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872694856] [2021-11-20 06:10:57,869 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:57,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083259319] [2021-11-20 06:10:57,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083259319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:57,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:57,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:10:57,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383679229] [2021-11-20 06:10:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:57,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:10:57,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:57,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:10:57,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:10:57,874 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:58,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:58,003 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-11-20 06:10:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:10:58,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-20 06:10:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:58,006 INFO L225 Difference]: With dead ends: 53 [2021-11-20 06:10:58,006 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 06:10:58,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:10:58,012 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:58,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 149 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 06:10:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2021-11-20 06:10:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:10:58,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-11-20 06:10:58,035 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2021-11-20 06:10:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:58,036 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-11-20 06:10:58,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:58,037 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-11-20 06:10:58,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:10:58,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:58,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:58,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:58,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:58,258 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:58,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1315139464, now seen corresponding path program 1 times [2021-11-20 06:10:58,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:58,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951787079] [2021-11-20 06:10:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:58,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:58,277 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:58,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489552536] [2021-11-20 06:10:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:58,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:58,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:58,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:10:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:58,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:10:58,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:10:58,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:58,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951787079] [2021-11-20 06:10:58,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:58,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489552536] [2021-11-20 06:10:58,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489552536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:58,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:58,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:10:58,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370368399] [2021-11-20 06:10:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:58,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:10:58,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:10:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:58,513 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:58,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:58,571 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2021-11-20 06:10:58,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:10:58,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-20 06:10:58,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:58,577 INFO L225 Difference]: With dead ends: 58 [2021-11-20 06:10:58,579 INFO L226 Difference]: Without dead ends: 36 [2021-11-20 06:10:58,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:10:58,581 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:58,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:10:58,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-20 06:10:58,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-20 06:10:58,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:10:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-20 06:10:58,608 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 25 [2021-11-20 06:10:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:58,609 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-20 06:10:58,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:58,610 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-20 06:10:58,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:10:58,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:58,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:58,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:58,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:58,840 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:58,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:58,840 INFO L85 PathProgramCache]: Analyzing trace with hash 570907173, now seen corresponding path program 1 times [2021-11-20 06:10:58,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:58,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915177254] [2021-11-20 06:10:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:58,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:58,859 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:58,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383830061] [2021-11-20 06:10:58,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:58,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:58,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:58,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:58,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:10:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:10:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:59,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:10:59,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:10:59,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:59,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915177254] [2021-11-20 06:10:59,198 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:59,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383830061] [2021-11-20 06:10:59,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383830061] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:10:59,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:10:59,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-20 06:10:59,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520007263] [2021-11-20 06:10:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:10:59,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:10:59,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:59,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:10:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:10:59,202 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:59,311 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-20 06:10:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:10:59,312 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2021-11-20 06:10:59,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:59,315 INFO L225 Difference]: With dead ends: 54 [2021-11-20 06:10:59,315 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 06:10:59,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:10:59,317 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 65 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:59,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 06:10:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-20 06:10:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-20 06:10:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-20 06:10:59,330 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2021-11-20 06:10:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:59,330 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-20 06:10:59,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:10:59,331 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-20 06:10:59,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 06:10:59,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:59,332 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:59,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:10:59,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:59,546 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:10:59,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:10:59,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1698298847, now seen corresponding path program 1 times [2021-11-20 06:10:59,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:10:59,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442181869] [2021-11-20 06:10:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:59,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:10:59,558 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:10:59,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1243661353] [2021-11-20 06:10:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:10:59,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:10:59,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:10:59,559 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:10:59,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:10:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:10:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:10:59,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:10:59,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:10:59,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:10:59,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:10:59,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:10:59,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442181869] [2021-11-20 06:10:59,790 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:10:59,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243661353] [2021-11-20 06:10:59,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243661353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:10:59,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:10:59,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-11-20 06:10:59,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479529171] [2021-11-20 06:10:59,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:10:59,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:10:59,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:10:59,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:10:59,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:10:59,793 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:10:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:10:59,925 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2021-11-20 06:10:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:10:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2021-11-20 06:10:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:10:59,929 INFO L225 Difference]: With dead ends: 147 [2021-11-20 06:10:59,929 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 06:10:59,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:10:59,931 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 94 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:10:59,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 201 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:10:59,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 06:10:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2021-11-20 06:10:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-20 06:10:59,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2021-11-20 06:10:59,954 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2021-11-20 06:10:59,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:10:59,954 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2021-11-20 06:10:59,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:10:59,955 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2021-11-20 06:10:59,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:10:59,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:10:59,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:10:59,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-20 06:11:00,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:00,172 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:00,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291835, now seen corresponding path program 1 times [2021-11-20 06:11:00,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:00,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063706028] [2021-11-20 06:11:00,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:00,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:00,192 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:00,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638976399] [2021-11-20 06:11:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:00,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:00,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:00,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:11:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:00,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:11:00,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:00,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:00,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:00,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063706028] [2021-11-20 06:11:00,537 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638976399] [2021-11-20 06:11:00,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638976399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:00,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:00,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-20 06:11:00,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380332892] [2021-11-20 06:11:00,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:00,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:11:00,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:00,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:11:00,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:11:00,540 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:11:00,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:00,776 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2021-11-20 06:11:00,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:11:00,776 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 06:11:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:00,781 INFO L225 Difference]: With dead ends: 183 [2021-11-20 06:11:00,782 INFO L226 Difference]: Without dead ends: 171 [2021-11-20 06:11:00,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:11:00,784 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 113 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:00,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 333 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:11:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-20 06:11:00,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2021-11-20 06:11:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:11:00,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2021-11-20 06:11:00,855 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2021-11-20 06:11:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:00,856 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2021-11-20 06:11:00,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:11:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2021-11-20 06:11:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:11:00,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:00,861 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:00,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 06:11:01,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:11:01,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash -200071253, now seen corresponding path program 1 times [2021-11-20 06:11:01,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013337068] [2021-11-20 06:11:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:01,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:01,079 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:01,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [514136301] [2021-11-20 06:11:01,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:01,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:01,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:01,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:01,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:11:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:01,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:11:01,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:01,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:01,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013337068] [2021-11-20 06:11:01,542 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:01,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514136301] [2021-11-20 06:11:01,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514136301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:01,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:01,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-20 06:11:01,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442059485] [2021-11-20 06:11:01,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:01,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:11:01,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:01,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:11:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:11:01,545 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:11:01,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:01,822 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2021-11-20 06:11:01,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:11:01,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-20 06:11:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:01,827 INFO L225 Difference]: With dead ends: 153 [2021-11-20 06:11:01,827 INFO L226 Difference]: Without dead ends: 151 [2021-11-20 06:11:01,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:11:01,829 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:01,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 241 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:11:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-20 06:11:01,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-11-20 06:11:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-20 06:11:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2021-11-20 06:11:01,864 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2021-11-20 06:11:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:01,865 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2021-11-20 06:11:01,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:11:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2021-11-20 06:11:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:11:01,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:01,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:01,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:02,088 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash 164485690, now seen corresponding path program 1 times [2021-11-20 06:11:02,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:02,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439807583] [2021-11-20 06:11:02,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:02,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:02,099 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:02,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145960327] [2021-11-20 06:11:02,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:02,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:02,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:02,113 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:02,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:11:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:02,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:11:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:11:02,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:02,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439807583] [2021-11-20 06:11:02,714 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145960327] [2021-11-20 06:11:02,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145960327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:02,718 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:02,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2021-11-20 06:11:02,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392150933] [2021-11-20 06:11:02,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:02,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:11:02,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:11:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:11:02,728 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:02,937 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2021-11-20 06:11:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:11:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-11-20 06:11:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:02,942 INFO L225 Difference]: With dead ends: 175 [2021-11-20 06:11:02,942 INFO L226 Difference]: Without dead ends: 173 [2021-11-20 06:11:02,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:11:02,947 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 63 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:02,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 392 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:11:02,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-20 06:11:02,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2021-11-20 06:11:02,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 06:11:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2021-11-20 06:11:02,980 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2021-11-20 06:11:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:02,980 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2021-11-20 06:11:02,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:02,981 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2021-11-20 06:11:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-20 06:11:02,985 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:02,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:03,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:03,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:03,200 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:03,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1985711111, now seen corresponding path program 1 times [2021-11-20 06:11:03,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:03,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052820111] [2021-11-20 06:11:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:03,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:03,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:03,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724504285] [2021-11-20 06:11:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:03,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:03,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:03,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:03,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:11:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:03,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:11:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:03,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:03,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052820111] [2021-11-20 06:11:03,373 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:03,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724504285] [2021-11-20 06:11:03,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724504285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:03,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:03,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:03,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257933542] [2021-11-20 06:11:03,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:03,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:11:03,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:11:03,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:03,378 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:11:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:03,438 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2021-11-20 06:11:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:11:03,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-11-20 06:11:03,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:03,446 INFO L225 Difference]: With dead ends: 237 [2021-11-20 06:11:03,447 INFO L226 Difference]: Without dead ends: 170 [2021-11-20 06:11:03,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:03,452 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:03,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 105 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:11:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-20 06:11:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-11-20 06:11:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-20 06:11:03,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2021-11-20 06:11:03,484 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2021-11-20 06:11:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:03,484 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2021-11-20 06:11:03,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:11:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2021-11-20 06:11:03,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:11:03,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:03,488 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:03,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:03,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:03,708 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:03,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1730540965, now seen corresponding path program 1 times [2021-11-20 06:11:03,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:03,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558692128] [2021-11-20 06:11:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:03,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:03,719 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [785698365] [2021-11-20 06:11:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:03,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:03,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:03,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:11:03,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:03,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:11:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:03,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:11:03,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:03,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558692128] [2021-11-20 06:11:03,897 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785698365] [2021-11-20 06:11:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785698365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:03,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:03,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:03,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834007600] [2021-11-20 06:11:03,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:03,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:03,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:03,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:03,900 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:03,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:03,984 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2021-11-20 06:11:03,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:11:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-20 06:11:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:03,988 INFO L225 Difference]: With dead ends: 235 [2021-11-20 06:11:03,988 INFO L226 Difference]: Without dead ends: 233 [2021-11-20 06:11:03,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:04,003 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:04,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:11:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-20 06:11:04,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2021-11-20 06:11:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 06:11:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2021-11-20 06:11:04,038 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2021-11-20 06:11:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:04,038 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2021-11-20 06:11:04,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2021-11-20 06:11:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:11:04,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:04,040 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:04,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:04,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:04,257 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash -2009961290, now seen corresponding path program 1 times [2021-11-20 06:11:04,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:04,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132585937] [2021-11-20 06:11:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:04,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:04,267 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:04,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794054875] [2021-11-20 06:11:04,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:04,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:04,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:04,269 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:04,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:11:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:04,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-20 06:11:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:04,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:04,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132585937] [2021-11-20 06:11:04,701 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:04,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794054875] [2021-11-20 06:11:04,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794054875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:04,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:11:04,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-20 06:11:04,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364030096] [2021-11-20 06:11:04,703 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:04,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:11:04,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:11:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:11:04,704 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:11:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:04,868 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2021-11-20 06:11:04,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:11:04,869 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-11-20 06:11:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:04,872 INFO L225 Difference]: With dead ends: 238 [2021-11-20 06:11:04,872 INFO L226 Difference]: Without dead ends: 236 [2021-11-20 06:11:04,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:11:04,873 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 38 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:04,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 271 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:11:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-20 06:11:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2021-11-20 06:11:04,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2021-11-20 06:11:04,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2021-11-20 06:11:04,904 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2021-11-20 06:11:04,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:04,904 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2021-11-20 06:11:04,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:11:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2021-11-20 06:11:04,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:11:04,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:04,906 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:04,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:05,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:11:05,116 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:05,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1954288725, now seen corresponding path program 1 times [2021-11-20 06:11:05,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:05,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062338159] [2021-11-20 06:11:05,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:05,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:05,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:05,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427241911] [2021-11-20 06:11:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:05,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:05,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:05,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:11:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:05,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:11:05,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:11:05,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:05,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:05,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062338159] [2021-11-20 06:11:05,327 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:05,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427241911] [2021-11-20 06:11:05,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427241911] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:05,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:05,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:05,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215215362] [2021-11-20 06:11:05,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:05,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:05,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:05,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:05,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:05,329 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:11:05,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:05,411 INFO L93 Difference]: Finished difference Result 331 states and 488 transitions. [2021-11-20 06:11:05,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:11:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2021-11-20 06:11:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:05,415 INFO L225 Difference]: With dead ends: 331 [2021-11-20 06:11:05,415 INFO L226 Difference]: Without dead ends: 329 [2021-11-20 06:11:05,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:05,417 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:05,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 156 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:11:05,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-20 06:11:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 292. [2021-11-20 06:11:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2021-11-20 06:11:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2021-11-20 06:11:05,463 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2021-11-20 06:11:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:05,463 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2021-11-20 06:11:05,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:11:05,464 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2021-11-20 06:11:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-20 06:11:05,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:05,465 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:05,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:05,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:11:05,689 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:05,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1977082887, now seen corresponding path program 1 times [2021-11-20 06:11:05,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:05,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153753363] [2021-11-20 06:11:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:05,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:05,698 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1937006632] [2021-11-20 06:11:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:05,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:05,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:05,700 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:05,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:11:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:05,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:11:05,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:11:05,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:11:05,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153753363] [2021-11-20 06:11:05,993 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:05,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937006632] [2021-11-20 06:11:05,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937006632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:05,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:05,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-11-20 06:11:05,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263213471] [2021-11-20 06:11:05,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:05,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:11:05,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:05,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:11:05,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:11:05,997 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:06,258 INFO L93 Difference]: Finished difference Result 725 states and 1031 transitions. [2021-11-20 06:11:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:11:06,258 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2021-11-20 06:11:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:06,265 INFO L225 Difference]: With dead ends: 725 [2021-11-20 06:11:06,265 INFO L226 Difference]: Without dead ends: 575 [2021-11-20 06:11:06,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:11:06,267 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 136 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:06,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 353 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:11:06,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-11-20 06:11:06,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2021-11-20 06:11:06,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 357 states have (on average 1.2997198879551821) internal successors, (464), 371 states have internal predecessors, (464), 142 states have call successors, (142), 41 states have call predecessors, (142), 41 states have return successors, (138), 128 states have call predecessors, (138), 138 states have call successors, (138) [2021-11-20 06:11:06,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 744 transitions. [2021-11-20 06:11:06,344 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 744 transitions. Word has length 38 [2021-11-20 06:11:06,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:06,344 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 744 transitions. [2021-11-20 06:11:06,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 744 transitions. [2021-11-20 06:11:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:11:06,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:06,346 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:06,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:06,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:11:06,571 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:06,572 INFO L85 PathProgramCache]: Analyzing trace with hash 321915013, now seen corresponding path program 2 times [2021-11-20 06:11:06,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:06,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546004217] [2021-11-20 06:11:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:06,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:06,580 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90210692] [2021-11-20 06:11:06,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:11:06,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:06,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:06,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:06,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:11:06,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:11:06,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:06,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:11:06,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:06,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:06,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546004217] [2021-11-20 06:11:06,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:06,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90210692] [2021-11-20 06:11:06,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90210692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:06,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:06,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:06,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298578471] [2021-11-20 06:11:06,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:06,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:06,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:06,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:06,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:06,724 INFO L87 Difference]: Start difference. First operand 541 states and 744 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:11:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:06,854 INFO L93 Difference]: Finished difference Result 788 states and 1135 transitions. [2021-11-20 06:11:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:11:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-11-20 06:11:06,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:06,860 INFO L225 Difference]: With dead ends: 788 [2021-11-20 06:11:06,861 INFO L226 Difference]: Without dead ends: 643 [2021-11-20 06:11:06,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:11:06,865 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 29 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:06,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:11:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-20 06:11:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 539. [2021-11-20 06:11:06,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 359 states have (on average 1.3064066852367688) internal successors, (469), 373 states have internal predecessors, (469), 138 states have call successors, (138), 41 states have call predecessors, (138), 41 states have return successors, (134), 124 states have call predecessors, (134), 134 states have call successors, (134) [2021-11-20 06:11:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 741 transitions. [2021-11-20 06:11:06,970 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 741 transitions. Word has length 39 [2021-11-20 06:11:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:06,971 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 741 transitions. [2021-11-20 06:11:06,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:11:06,971 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 741 transitions. [2021-11-20 06:11:06,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:11:06,972 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:06,972 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:07,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:07,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:11:07,173 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1715872859, now seen corresponding path program 1 times [2021-11-20 06:11:07,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:07,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872716319] [2021-11-20 06:11:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:07,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:07,182 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:07,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162255566] [2021-11-20 06:11:07,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:07,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:07,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:07,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:07,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:11:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:07,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:11:07,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:07,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:11:07,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872716319] [2021-11-20 06:11:07,584 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:07,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162255566] [2021-11-20 06:11:07,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162255566] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:07,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:07,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-11-20 06:11:07,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046743780] [2021-11-20 06:11:07,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:07,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:11:07,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:11:07,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:11:07,586 INFO L87 Difference]: Start difference. First operand 539 states and 741 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:07,993 INFO L93 Difference]: Finished difference Result 1163 states and 1625 transitions. [2021-11-20 06:11:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:11:07,994 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-20 06:11:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:08,002 INFO L225 Difference]: With dead ends: 1163 [2021-11-20 06:11:08,002 INFO L226 Difference]: Without dead ends: 840 [2021-11-20 06:11:08,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:11:08,005 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 205 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:08,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 385 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:11:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2021-11-20 06:11:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 803. [2021-11-20 06:11:08,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2021-11-20 06:11:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2021-11-20 06:11:08,128 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2021-11-20 06:11:08,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:08,129 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2021-11-20 06:11:08,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:11:08,129 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2021-11-20 06:11:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:11:08,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:08,131 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:08,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:08,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:08,348 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:08,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:08,348 INFO L85 PathProgramCache]: Analyzing trace with hash 753696694, now seen corresponding path program 1 times [2021-11-20 06:11:08,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:08,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693638502] [2021-11-20 06:11:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:08,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:08,364 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:08,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92883557] [2021-11-20 06:11:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:08,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:08,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:08,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:08,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:11:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:08,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-20 06:11:08,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:09,392 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:11:09,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:11:10,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693638502] [2021-11-20 06:11:10,567 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92883557] [2021-11-20 06:11:10,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92883557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:10,567 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:10,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-20 06:11:10,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107175287] [2021-11-20 06:11:10,568 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:10,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 06:11:10,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 06:11:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:11:10,570 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 06:11:17,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:11:23,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:23,375 INFO L93 Difference]: Finished difference Result 1090 states and 1502 transitions. [2021-11-20 06:11:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:11:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 54 [2021-11-20 06:11:23,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:23,384 INFO L225 Difference]: With dead ends: 1090 [2021-11-20 06:11:23,384 INFO L226 Difference]: Without dead ends: 1082 [2021-11-20 06:11:23,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:11:23,387 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 150 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 775 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:23,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 775 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1213 Invalid, 1 Unknown, 0 Unchecked, 11.3s Time] [2021-11-20 06:11:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2021-11-20 06:11:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 974. [2021-11-20 06:11:23,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 664 states have (on average 1.2545180722891567) internal successors, (833), 679 states have internal predecessors, (833), 242 states have call successors, (242), 67 states have call predecessors, (242), 67 states have return successors, (238), 227 states have call predecessors, (238), 238 states have call successors, (238) [2021-11-20 06:11:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1313 transitions. [2021-11-20 06:11:23,577 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1313 transitions. Word has length 54 [2021-11-20 06:11:23,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:23,577 INFO L470 AbstractCegarLoop]: Abstraction has 974 states and 1313 transitions. [2021-11-20 06:11:23,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-20 06:11:23,578 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1313 transitions. [2021-11-20 06:11:23,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:11:23,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:23,579 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:23,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:23,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:11:23,808 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:23,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2108492507, now seen corresponding path program 1 times [2021-11-20 06:11:23,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940770648] [2021-11-20 06:11:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:23,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:23,816 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:23,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981537763] [2021-11-20 06:11:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:23,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:23,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:23,828 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:23,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:11:23,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:23,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:11:23,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:11:24,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 06:11:24,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940770648] [2021-11-20 06:11:24,288 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:24,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981537763] [2021-11-20 06:11:24,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981537763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:24,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:24,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-11-20 06:11:24,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390977045] [2021-11-20 06:11:24,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:24,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:11:24,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:11:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:11:24,290 INFO L87 Difference]: Start difference. First operand 974 states and 1313 transitions. Second operand has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:11:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:24,729 INFO L93 Difference]: Finished difference Result 1059 states and 1402 transitions. [2021-11-20 06:11:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:11:24,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 60 [2021-11-20 06:11:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:24,737 INFO L225 Difference]: With dead ends: 1059 [2021-11-20 06:11:24,737 INFO L226 Difference]: Without dead ends: 1037 [2021-11-20 06:11:24,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:11:24,739 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 214 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:24,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 280 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:11:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-11-20 06:11:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 1000. [2021-11-20 06:11:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 691 states have (on average 1.231548480463097) internal successors, (851), 705 states have internal predecessors, (851), 241 states have call successors, (241), 67 states have call predecessors, (241), 67 states have return successors, (238), 227 states have call predecessors, (238), 238 states have call successors, (238) [2021-11-20 06:11:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1330 transitions. [2021-11-20 06:11:24,931 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1330 transitions. Word has length 60 [2021-11-20 06:11:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:24,932 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1330 transitions. [2021-11-20 06:11:24,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.785714285714286) internal successors, (67), 14 states have internal predecessors, (67), 5 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-20 06:11:24,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1330 transitions. [2021-11-20 06:11:24,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:11:24,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:24,934 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:24,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:25,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:11:25,147 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash -862496580, now seen corresponding path program 1 times [2021-11-20 06:11:25,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866350600] [2021-11-20 06:11:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:25,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:25,154 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:25,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867412818] [2021-11-20 06:11:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:25,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:25,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:25,163 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:25,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:11:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:25,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:11:25,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-20 06:11:25,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-20 06:11:25,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:25,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866350600] [2021-11-20 06:11:25,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:25,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867412818] [2021-11-20 06:11:25,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867412818] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-20 06:11:25,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:11:25,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 06:11:25,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337406454] [2021-11-20 06:11:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:25,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:25,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:25,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:25,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:11:25,673 INFO L87 Difference]: Start difference. First operand 1000 states and 1330 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:11:25,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:25,975 INFO L93 Difference]: Finished difference Result 1027 states and 1356 transitions. [2021-11-20 06:11:25,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:11:25,975 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-11-20 06:11:25,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:25,984 INFO L225 Difference]: With dead ends: 1027 [2021-11-20 06:11:25,984 INFO L226 Difference]: Without dead ends: 1025 [2021-11-20 06:11:25,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:11:25,987 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:25,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:11:25,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2021-11-20 06:11:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1020. [2021-11-20 06:11:26,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 706 states have (on average 1.2237960339943343) internal successors, (864), 720 states have internal predecessors, (864), 241 states have call successors, (241), 72 states have call predecessors, (241), 72 states have return successors, (238), 227 states have call predecessors, (238), 238 states have call successors, (238) [2021-11-20 06:11:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1343 transitions. [2021-11-20 06:11:26,211 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1343 transitions. Word has length 63 [2021-11-20 06:11:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:26,212 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1343 transitions. [2021-11-20 06:11:26,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 06:11:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1343 transitions. [2021-11-20 06:11:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:11:26,213 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:26,214 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:26,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:26,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:26,431 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1447364546, now seen corresponding path program 1 times [2021-11-20 06:11:26,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:26,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795094437] [2021-11-20 06:11:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:26,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:26,438 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:26,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1914374808] [2021-11-20 06:11:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:26,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:26,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:26,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:26,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:11:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:26,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 06:11:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 06:11:26,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-20 06:11:27,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:27,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795094437] [2021-11-20 06:11:27,179 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914374808] [2021-11-20 06:11:27,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914374808] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:27,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:27,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2021-11-20 06:11:27,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808523261] [2021-11-20 06:11:27,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:27,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:11:27,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:27,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:11:27,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:11:27,182 INFO L87 Difference]: Start difference. First operand 1020 states and 1343 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:11:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:27,955 INFO L93 Difference]: Finished difference Result 1185 states and 1578 transitions. [2021-11-20 06:11:27,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:11:27,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-11-20 06:11:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:27,965 INFO L225 Difference]: With dead ends: 1185 [2021-11-20 06:11:27,965 INFO L226 Difference]: Without dead ends: 1183 [2021-11-20 06:11:27,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:11:27,967 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 103 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:27,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 444 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:11:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-11-20 06:11:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1067. [2021-11-20 06:11:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 756 states have (on average 1.2380952380952381) internal successors, (936), 776 states have internal predecessors, (936), 236 states have call successors, (236), 74 states have call predecessors, (236), 74 states have return successors, (233), 216 states have call predecessors, (233), 233 states have call successors, (233) [2021-11-20 06:11:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1405 transitions. [2021-11-20 06:11:28,215 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1405 transitions. Word has length 66 [2021-11-20 06:11:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:28,215 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 1405 transitions. [2021-11-20 06:11:28,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 13 states have internal predecessors, (71), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-20 06:11:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1405 transitions. [2021-11-20 06:11:28,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 06:11:28,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:28,218 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:28,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:28,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:28,440 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash 834529569, now seen corresponding path program 2 times [2021-11-20 06:11:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606244239] [2021-11-20 06:11:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:28,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:28,446 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177444902] [2021-11-20 06:11:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:11:28,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:28,448 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:28,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:11:28,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:11:28,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:28,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:11:28,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 06:11:28,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:11:28,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:28,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606244239] [2021-11-20 06:11:28,627 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:28,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177444902] [2021-11-20 06:11:28,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177444902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:11:28,627 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:11:28,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:11:28,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673272222] [2021-11-20 06:11:28,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:11:28,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:11:28,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:11:28,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:11:28,629 INFO L87 Difference]: Start difference. First operand 1067 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:11:28,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:28,845 INFO L93 Difference]: Finished difference Result 1812 states and 2409 transitions. [2021-11-20 06:11:28,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:11:28,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 69 [2021-11-20 06:11:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:28,855 INFO L225 Difference]: With dead ends: 1812 [2021-11-20 06:11:28,856 INFO L226 Difference]: Without dead ends: 1104 [2021-11-20 06:11:28,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:11:28,859 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 12 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:28,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:11:28,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2021-11-20 06:11:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1045. [2021-11-20 06:11:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 759 states have (on average 1.2397891963109355) internal successors, (941), 767 states have internal predecessors, (941), 213 states have call successors, (213), 72 states have call predecessors, (213), 72 states have return successors, (210), 205 states have call predecessors, (210), 210 states have call successors, (210) [2021-11-20 06:11:29,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 1364 transitions. [2021-11-20 06:11:29,077 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 1364 transitions. Word has length 69 [2021-11-20 06:11:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:29,078 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 1364 transitions. [2021-11-20 06:11:29,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-20 06:11:29,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 1364 transitions. [2021-11-20 06:11:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-20 06:11:29,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:29,080 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:29,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:29,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 06:11:29,295 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:29,296 INFO L85 PathProgramCache]: Analyzing trace with hash 211513650, now seen corresponding path program 3 times [2021-11-20 06:11:29,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:29,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918939151] [2021-11-20 06:11:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:29,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:29,302 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:29,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403612182] [2021-11-20 06:11:29,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:11:29,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:29,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:29,304 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:29,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:11:29,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:11:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:11:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-20 06:11:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:30,320 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 33 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 06:11:30,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-20 06:11:34,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918939151] [2021-11-20 06:11:34,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:34,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403612182] [2021-11-20 06:11:34,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403612182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:34,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:34,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 22 [2021-11-20 06:11:34,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355617373] [2021-11-20 06:11:34,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:34,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:11:34,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:11:34,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=1, NotChecked=0, Total=462 [2021-11-20 06:11:34,208 INFO L87 Difference]: Start difference. First operand 1045 states and 1364 transitions. Second operand has 22 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 06:11:39,267 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:11:40,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:11:40,332 INFO L93 Difference]: Finished difference Result 1116 states and 1461 transitions. [2021-11-20 06:11:40,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:11:40,333 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 71 [2021-11-20 06:11:40,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:11:40,340 INFO L225 Difference]: With dead ends: 1116 [2021-11-20 06:11:40,340 INFO L226 Difference]: Without dead ends: 1108 [2021-11-20 06:11:40,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=320, Invalid=1401, Unknown=1, NotChecked=0, Total=1722 [2021-11-20 06:11:40,343 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 173 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 174 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:11:40,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 836 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 737 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-11-20 06:11:40,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-20 06:11:40,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1036. [2021-11-20 06:11:40,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 752 states have (on average 1.2327127659574468) internal successors, (927), 757 states have internal predecessors, (927), 211 states have call successors, (211), 73 states have call predecessors, (211), 72 states have return successors, (210), 205 states have call predecessors, (210), 210 states have call successors, (210) [2021-11-20 06:11:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1348 transitions. [2021-11-20 06:11:40,568 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1348 transitions. Word has length 71 [2021-11-20 06:11:40,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:11:40,568 INFO L470 AbstractCegarLoop]: Abstraction has 1036 states and 1348 transitions. [2021-11-20 06:11:40,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 7 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-20 06:11:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1348 transitions. [2021-11-20 06:11:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-20 06:11:40,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:11:40,571 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:11:40,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:11:40,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-20 06:11:40,795 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:11:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:11:40,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1813624164, now seen corresponding path program 1 times [2021-11-20 06:11:40,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:11:40,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561767322] [2021-11-20 06:11:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:40,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:11:40,812 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:11:40,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983607200] [2021-11-20 06:11:40,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:11:40,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:11:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:11:40,819 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:11:40,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:11:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:11:40,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-20 06:11:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:11:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 51 proven. 39 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-20 06:11:42,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:11:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-20 06:11:44,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:11:44,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561767322] [2021-11-20 06:11:44,529 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:11:44,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983607200] [2021-11-20 06:11:44,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983607200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:11:44,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:11:44,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-11-20 06:11:44,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416590309] [2021-11-20 06:11:44,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:11:44,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-20 06:11:44,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:11:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-20 06:11:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:11:44,531 INFO L87 Difference]: Start difference. First operand 1036 states and 1348 transitions. Second operand has 29 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:11:46,541 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:11:54,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:01,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:13,827 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:18,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:27,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:29,834 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:31,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:35,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:39,008 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:41,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:44,150 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-11-20 06:12:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:44,695 INFO L93 Difference]: Finished difference Result 1366 states and 1812 transitions. [2021-11-20 06:12:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 06:12:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) Word has length 84 [2021-11-20 06:12:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:44,704 INFO L225 Difference]: With dead ends: 1366 [2021-11-20 06:12:44,705 INFO L226 Difference]: Without dead ends: 1360 [2021-11-20 06:12:44,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 28.1s TimeCoverageRelationStatistics Valid=1181, Invalid=5461, Unknown=0, NotChecked=0, Total=6642 [2021-11-20 06:12:44,709 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 439 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 507 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 1968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:44,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 1020 Invalid, 1968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 1451 Invalid, 10 Unknown, 0 Unchecked, 32.7s Time] [2021-11-20 06:12:44,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-11-20 06:12:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 1199. [2021-11-20 06:12:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 851 states have (on average 1.2502937720329024) internal successors, (1064), 856 states have internal predecessors, (1064), 263 states have call successors, (263), 85 states have call predecessors, (263), 84 states have return successors, (262), 257 states have call predecessors, (262), 262 states have call successors, (262) [2021-11-20 06:12:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1589 transitions. [2021-11-20 06:12:45,064 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1589 transitions. Word has length 84 [2021-11-20 06:12:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:45,065 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1589 transitions. [2021-11-20 06:12:45,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.8) internal successors, (70), 26 states have internal predecessors, (70), 10 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 8 states have call successors, (18) [2021-11-20 06:12:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1589 transitions. [2021-11-20 06:12:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-20 06:12:45,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:45,068 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:45,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:45,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:45,290 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:45,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash 704622192, now seen corresponding path program 1 times [2021-11-20 06:12:45,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:45,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433093244] [2021-11-20 06:12:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:45,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:45,300 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753384670] [2021-11-20 06:12:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:45,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:45,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:45,302 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:45,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:12:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:12:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:12:45,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:12:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-20 06:12:45,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:12:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-20 06:12:45,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:12:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433093244] [2021-11-20 06:12:45,956 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:12:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753384670] [2021-11-20 06:12:45,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753384670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:12:45,956 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:12:45,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-11-20 06:12:45,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333834914] [2021-11-20 06:12:45,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:12:45,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:12:45,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:12:45,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:12:45,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:12:45,958 INFO L87 Difference]: Start difference. First operand 1199 states and 1589 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 06:12:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:12:46,519 INFO L93 Difference]: Finished difference Result 1574 states and 2158 transitions. [2021-11-20 06:12:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:12:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 93 [2021-11-20 06:12:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:12:46,527 INFO L225 Difference]: With dead ends: 1574 [2021-11-20 06:12:46,528 INFO L226 Difference]: Without dead ends: 1222 [2021-11-20 06:12:46,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:12:46,530 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 171 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:12:46,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 295 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:12:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-20 06:12:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1210. [2021-11-20 06:12:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 862 states have (on average 1.2366589327146171) internal successors, (1066), 867 states have internal predecessors, (1066), 263 states have call successors, (263), 85 states have call predecessors, (263), 84 states have return successors, (262), 257 states have call predecessors, (262), 262 states have call successors, (262) [2021-11-20 06:12:46,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1591 transitions. [2021-11-20 06:12:46,867 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1591 transitions. Word has length 93 [2021-11-20 06:12:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:12:46,867 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1591 transitions. [2021-11-20 06:12:46,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 4 states have call successors, (21), 5 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-20 06:12:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1591 transitions. [2021-11-20 06:12:46,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-20 06:12:46,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:12:46,871 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:46,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:47,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:47,084 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:12:47,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:12:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash 784770345, now seen corresponding path program 2 times [2021-11-20 06:12:47,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:12:47,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200521451] [2021-11-20 06:12:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:12:47,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:12:47,093 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:12:47,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915792263] [2021-11-20 06:12:47,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:12:47,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:12:47,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:12:47,095 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:12:47,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:12:47,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:12:47,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-20 06:12:47,242 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:12:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:12:47,336 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:12:47,336 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:12:47,337 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:12:47,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:12:47,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:12:47,557 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:12:47,561 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:12:47,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:12:47 BoogieIcfgContainer [2021-11-20 06:12:47,643 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:12:47,643 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:12:47,643 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:12:47,643 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:12:47,644 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:10:56" (3/4) ... [2021-11-20 06:12:47,646 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 06:12:47,724 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:12:47,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:12:47,725 INFO L158 Benchmark]: Toolchain (without parser) took 112233.70ms. Allocated memory was 104.9MB in the beginning and 192.9MB in the end (delta: 88.1MB). Free memory was 63.2MB in the beginning and 126.0MB in the end (delta: -62.9MB). Peak memory consumption was 24.4MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,726 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 104.9MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:12:47,726 INFO L158 Benchmark]: CACSL2BoogieTranslator took 409.95ms. Allocated memory is still 104.9MB. Free memory was 62.9MB in the beginning and 79.8MB in the end (delta: -16.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,727 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.99ms. Allocated memory is still 104.9MB. Free memory was 79.5MB in the beginning and 78.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,727 INFO L158 Benchmark]: Boogie Preprocessor took 53.43ms. Allocated memory is still 104.9MB. Free memory was 78.1MB in the beginning and 77.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,727 INFO L158 Benchmark]: RCFGBuilder took 424.03ms. Allocated memory is still 104.9MB. Free memory was 77.0MB in the beginning and 66.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,728 INFO L158 Benchmark]: TraceAbstraction took 111206.58ms. Allocated memory was 104.9MB in the beginning and 192.9MB in the end (delta: 88.1MB). Free memory was 65.6MB in the beginning and 132.3MB in the end (delta: -66.8MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,728 INFO L158 Benchmark]: Witness Printer took 81.45ms. Allocated memory is still 192.9MB. Free memory was 132.3MB in the beginning and 126.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-20 06:12:47,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 104.9MB. Free memory is still 79.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 409.95ms. Allocated memory is still 104.9MB. Free memory was 62.9MB in the beginning and 79.8MB in the end (delta: -16.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.99ms. Allocated memory is still 104.9MB. Free memory was 79.5MB in the beginning and 78.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.43ms. Allocated memory is still 104.9MB. Free memory was 78.1MB in the beginning and 77.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 424.03ms. Allocated memory is still 104.9MB. Free memory was 77.0MB in the beginning and 66.0MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 111206.58ms. Allocated memory was 104.9MB in the beginning and 192.9MB in the end (delta: 88.1MB). Free memory was 65.6MB in the beginning and 132.3MB in the end (delta: -66.8MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. * Witness Printer took 81.45ms. Allocated memory is still 192.9MB. Free memory was 132.3MB in the beginning and 126.0MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=9, y=17] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=9, y=17] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=9, b=17, counter=0, p=1, q=0, r=0, s=1, x=9, y=17] [L34] EXPR counter++ VAL [a=9, b=17, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=9, y=17] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=9, b=17, c=9, counter=1, k=0, p=1, q=0, r=0, s=1, x=9, y=17] [L41] EXPR counter++ VAL [a=9, b=17, c=9, counter=2, counter++=1, k=0, p=1, q=0, r=0, s=1, x=9, y=17] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=9, b=17, c=9, counter=2, k=0, p=1, q=0, r=0, s=1, x=9, y=17] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=17, b=9, c=9, counter=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=9, y=17] [L34] EXPR counter++ VAL [a=17, b=9, c=9, counter=3, counter++=2, k=0, p=0, q=1, r=1, s=0, temp=0, x=9, y=17] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=17, b=9, c=17, counter=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=9, y=17] [L41] EXPR counter++ VAL [a=17, b=9, c=17, counter=4, counter++=3, k=0, p=0, q=1, r=1, s=0, temp=0, x=9, y=17] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=17, b=9, c=17, counter=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L48] EXPR counter++ VAL [a=17, b=9, c=17, counter=5, counter++=4, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=17, b=9, c=17, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=17, b=9, c=17, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=17, b=9, c=17, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=17, b=9, c=17, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L54] COND TRUE !(c >= 2 * v) VAL [a=17, b=9, c=17, counter=5, d=1, k=0, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L59] c = c - v [L60] k = k + d VAL [a=17, b=9, c=8, counter=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L41] EXPR counter++ VAL [a=17, b=9, c=8, counter=6, counter++=5, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=17, b=9, c=8, counter=6, d=1, k=1, p=0, q=1, r=1, s=0, temp=0, v=9, x=9, y=17] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=9, b=8, c=8, counter=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=9, x=9, y=17] [L34] EXPR counter++ VAL [a=9, b=8, c=8, counter=7, counter++=6, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=9, x=9, y=17] [L34] COND TRUE counter++<10 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [a=9, b=8, c=9, counter=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=9, x=9, y=17] [L41] EXPR counter++ VAL [a=9, b=8, c=9, counter=8, counter++=7, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=9, x=9, y=17] [L41] COND TRUE counter++<10 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [a=9, b=8, c=9, counter=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L48] EXPR counter++ VAL [a=9, b=8, c=9, counter=9, counter++=8, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L48] COND TRUE counter++<10 [L49] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L49] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=9, b=8, c=9, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L50] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L50] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=9, b=8, c=9, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L51] CALL __VERIFIER_assert(a == k * b + c) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L51] RET __VERIFIER_assert(a == k * b + c) VAL [a=9, b=8, c=9, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L52] CALL __VERIFIER_assert(v == b * d) VAL [\old(cond)=1, counter=9] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L52] RET __VERIFIER_assert(v == b * d) VAL [a=9, b=8, c=9, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L54] COND TRUE !(c >= 2 * v) VAL [a=9, b=8, c=9, counter=9, d=1, k=0, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L59] c = c - v [L60] k = k + d VAL [a=9, b=8, c=1, counter=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L41] EXPR counter++ VAL [a=9, b=8, c=1, counter=10, counter++=9, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L41] COND TRUE counter++<10 [L42] COND TRUE !(c >= b) VAL [a=9, b=8, c=1, counter=10, d=1, k=1, p=1, q=-1, r=0, s=1, temp=1, v=8, x=9, y=17] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [a=8, b=1, c=1, counter=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=9, y=17] [L34] EXPR counter++ VAL [a=8, b=1, c=1, counter=11, counter++=10, d=1, k=1, p=-1, q=2, r=1, s=-1, temp=0, v=8, x=9, y=17] [L34] COND FALSE !(counter++<10) [L73] CALL __VERIFIER_assert(p*x - q*x + r*y - s*y == a) VAL [\old(cond)=0, counter=11] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 111.0s, OverallIterations: 25, TraceHistogramMax: 9, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 84.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 12 mSolverCounterUnknown, 2280 SdHoareTripleChecker+Valid, 51.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2204 mSDsluCounter, 7264 SdHoareTripleChecker+Invalid, 50.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6036 mSDsCounter, 1494 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5328 IncrementalHoareTripleChecker+Invalid, 6834 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1494 mSolverCounterUnsat, 1228 mSDtfsCounter, 5328 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1839 GetRequests, 1469 SyntacticMatches, 14 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2894 ImplicationChecksByTransitivity, 35.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1210occurred in iteration=24, InterpolantAutomatonStates: 323, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.7s AutomataMinimizationTime, 24 MinimizatonAttempts, 904 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.5s InterpolantComputationTime, 1136 NumberOfCodeBlocks, 1121 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1659 ConstructedInterpolants, 0 QuantifiedInterpolants, 9699 SizeOfPredicates, 108 NumberOfNonLiveVariables, 3398 ConjunctsInSsa, 457 ConjunctsInUnsatCore, 36 InterpolantComputations, 12 PerfectInterpolantSequences, 1285/1739 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-20 06:12:47,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02811ca5-b830-42e3-8fcc-f84b00963613/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE