./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:06:41,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:06:41,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:06:41,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:06:41,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:06:41,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:06:41,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:06:41,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:06:41,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:06:41,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:06:41,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:06:41,897 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:06:41,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:06:41,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:06:41,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:06:41,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:06:41,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:06:41,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:06:41,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:06:41,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:06:41,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:06:41,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:06:41,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:06:41,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:06:41,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:06:41,921 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:06:41,921 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:06:41,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:06:41,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:06:41,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:06:41,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:06:41,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:06:41,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:06:41,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:06:41,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:06:41,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:06:41,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:06:41,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:06:41,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:06:41,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:06:41,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:06:41,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:06:41,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:06:41,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:06:41,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:06:41,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:06:41,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:06:41,953 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:06:41,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:06:41,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:06:41,953 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:06:41,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:06:41,954 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:06:41,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:06:41,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:06:41,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:06:41,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:06:41,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:06:41,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:06:41,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:06:41,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:06:41,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:06:41,957 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:06:41,957 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_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea97fe631de3abcfa1030cdb800e2845e2e97a42347e391a7c9fd401d3d0b815 [2021-12-06 23:06:42,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:06:42,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:06:42,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:06:42,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:06:42,157 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:06:42,158 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2021-12-06 23:06:42,198 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/data/f4f79949d/610e0feefa6f43a791beb71c7514bfcf/FLAGdbeaaeb1d [2021-12-06 23:06:42,583 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:06:42,583 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i [2021-12-06 23:06:42,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/data/f4f79949d/610e0feefa6f43a791beb71c7514bfcf/FLAGdbeaaeb1d [2021-12-06 23:06:42,597 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/data/f4f79949d/610e0feefa6f43a791beb71c7514bfcf [2021-12-06 23:06:42,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:06:42,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:06:42,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:06:42,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:06:42,603 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:06:42,604 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756f2782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42, skipping insertion in model container [2021-12-06 23:06:42,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:06:42,620 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:06:42,722 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i[950,963] [2021-12-06 23:06:42,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:06:42,740 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:06:42,750 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_424264b7-044c-47cf-a96f-46a7430e9ed2/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound1.i[950,963] [2021-12-06 23:06:42,755 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:06:42,766 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:06:42,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42 WrapperNode [2021-12-06 23:06:42,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:06:42,767 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:06:42,767 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:06:42,767 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:06:42,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,798 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2021-12-06 23:06:42,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:06:42,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:06:42,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:06:42,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:06:42,807 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:06:42,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:06:42,817 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:06:42,817 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:06:42,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (1/1) ... [2021-12-06 23:06:42,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:06:42,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:42,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:06:42,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:06:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:06:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 23:06:42,872 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 23:06:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:06:42,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:06:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:06:42,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 23:06:42,873 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 23:06:42,917 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:06:42,918 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:06:42,998 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:06:43,003 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:06:43,003 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 23:06:43,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:06:43 BoogieIcfgContainer [2021-12-06 23:06:43,004 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:06:43,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:06:43,006 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:06:43,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:06:43,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:06:42" (1/3) ... [2021-12-06 23:06:43,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4785f8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:06:43, skipping insertion in model container [2021-12-06 23:06:43,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:06:42" (2/3) ... [2021-12-06 23:06:43,009 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4785f8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:06:43, skipping insertion in model container [2021-12-06 23:06:43,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:06:43" (3/3) ... [2021-12-06 23:06:43,010 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound1.i [2021-12-06 23:06:43,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:06:43,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:06:43,051 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:06:43,057 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:06:43,057 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:06:43,070 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 23:06:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 23:06:43,074 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:43,074 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:43,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:43,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:43,079 INFO L85 PathProgramCache]: Analyzing trace with hash 913242413, now seen corresponding path program 1 times [2021-12-06 23:06:43,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:43,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63749340] [2021-12-06 23:06:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:43,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:06:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:06:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-06 23:06:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-06 23:06:43,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 23:06:43,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:43,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63749340] [2021-12-06 23:06:43,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63749340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:43,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:43,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 23:06:43,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466111428] [2021-12-06 23:06:43,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:43,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 23:06:43,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:43,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 23:06:43,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:06:43,258 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 23:06:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:43,275 INFO L93 Difference]: Finished difference Result 55 states and 84 transitions. [2021-12-06 23:06:43,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 23:06:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-12-06 23:06:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:43,282 INFO L225 Difference]: With dead ends: 55 [2021-12-06 23:06:43,282 INFO L226 Difference]: Without dead ends: 25 [2021-12-06 23:06:43,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 23:06:43,289 INFO L933 BasicCegarLoop]: 35 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, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:43,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:06:43,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-06 23:06:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-06 23:06:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 23:06:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2021-12-06 23:06:43,317 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2021-12-06 23:06:43,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:43,317 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2021-12-06 23:06:43,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 23:06:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2021-12-06 23:06:43,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-06 23:06:43,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:43,321 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:43,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:06:43,321 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:43,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2061833476, now seen corresponding path program 1 times [2021-12-06 23:06:43,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655227070] [2021-12-06 23:06:43,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:43,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:43,340 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:06:43,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847191546] [2021-12-06 23:06:43,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:43,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:43,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:43,342 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:43,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:06:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:06:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:43,606 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:06:43,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 23:06:43,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:43,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655227070] [2021-12-06 23:06:43,716 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:06:43,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847191546] [2021-12-06 23:06:43,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847191546] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:43,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:06:43,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-12-06 23:06:43,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024775406] [2021-12-06 23:06:43,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:43,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:06:43,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:43,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:06:43,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:06:43,719 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:06:46,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 23:06:48,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 23:06:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:48,567 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-12-06 23:06:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 23:06:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-12-06 23:06:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:48,569 INFO L225 Difference]: With dead ends: 37 [2021-12-06 23:06:48,569 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 23:06:48,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:06:48,570 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:48,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 95 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2021-12-06 23:06:48,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 23:06:48,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-12-06 23:06:48,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 23:06:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-06 23:06:48,577 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2021-12-06 23:06:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:48,578 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-06 23:06:48,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:06:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-06 23:06:48,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-06 23:06:48,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:48,579 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:48,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:06:48,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-12-06 23:06:48,782 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1044269705, now seen corresponding path program 1 times [2021-12-06 23:06:48,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:48,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612121837] [2021-12-06 23:06:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:48,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:48,838 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:06:48,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957384719] [2021-12-06 23:06:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:48,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:48,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:48,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:48,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:06:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:48,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 23:06:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:49,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 23:06:49,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 23:06:49,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612121837] [2021-12-06 23:06:49,320 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:06:49,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957384719] [2021-12-06 23:06:49,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957384719] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-06 23:06:49,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 23:06:49,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-06 23:06:49,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006290909] [2021-12-06 23:06:49,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:49,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:06:49,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:06:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 23:06:49,323 INFO L87 Difference]: Start difference. First operand 34 states and 41 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:06:49,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:49,350 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-06 23:06:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:06:49,351 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-06 23:06:49,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:49,352 INFO L225 Difference]: With dead ends: 42 [2021-12-06 23:06:49,353 INFO L226 Difference]: Without dead ends: 40 [2021-12-06 23:06:49,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:06:49,354 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:49,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2021-12-06 23:06:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-06 23:06:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-12-06 23:06:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 23:06:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2021-12-06 23:06:49,365 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2021-12-06 23:06:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:49,365 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2021-12-06 23:06:49,366 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 23:06:49,366 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2021-12-06 23:06:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:06:49,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:49,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:06:49,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:06:49,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:49,568 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1786164585, now seen corresponding path program 1 times [2021-12-06 23:06:49,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:49,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588703132] [2021-12-06 23:06:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:49,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:49,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:06:49,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029032682] [2021-12-06 23:06:49,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:49,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:49,581 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:49,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:06:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:49,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 23:06:49,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-06 23:06:49,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 23:06:49,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588703132] [2021-12-06 23:06:49,646 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:06:49,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029032682] [2021-12-06 23:06:49,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029032682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:49,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:49,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:06:49,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776518480] [2021-12-06 23:06:49,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:49,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:06:49,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:49,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:06:49,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:06:49,648 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 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) [2021-12-06 23:06:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:49,664 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2021-12-06 23:06:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:06:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 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 39 [2021-12-06 23:06:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:49,666 INFO L225 Difference]: With dead ends: 51 [2021-12-06 23:06:49,666 INFO L226 Difference]: Without dead ends: 33 [2021-12-06 23:06:49,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:06:49,667 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 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 [2021-12-06 23:06:49,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:06:49,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-06 23:06:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-06 23:06:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 23:06:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-06 23:06:49,672 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 39 [2021-12-06 23:06:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-06 23:06:49,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 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) [2021-12-06 23:06:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-06 23:06:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 23:06:49,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:49,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-06 23:06:49,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:06:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:49,876 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:49,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1444020969, now seen corresponding path program 1 times [2021-12-06 23:06:49,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:49,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878982174] [2021-12-06 23:06:49,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:49,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:49,917 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:06:49,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685237157] [2021-12-06 23:06:49,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:49,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:49,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:49,919 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:49,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:06:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 23:06:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:06:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 23:06:50,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:06:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-06 23:06:50,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:50,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878982174] [2021-12-06 23:06:50,124 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 23:06:50,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685237157] [2021-12-06 23:06:50,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685237157] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:06:50,125 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:06:50,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-12-06 23:06:50,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451575157] [2021-12-06 23:06:50,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:06:50,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:06:50,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:06:50,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:06:50,126 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:06:52,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-06 23:06:52,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:06:52,364 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-12-06 23:06:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 23:06:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 39 [2021-12-06 23:06:52,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:06:52,365 INFO L225 Difference]: With dead ends: 39 [2021-12-06 23:06:52,365 INFO L226 Difference]: Without dead ends: 32 [2021-12-06 23:06:52,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:06:52,366 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:06:52,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 23:06:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-06 23:06:52,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-12-06 23:06:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 23:06:52,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-06 23:06:52,371 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2021-12-06 23:06:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:52,371 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-06 23:06:52,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 23:06:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-06 23:06:52,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:06:52,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:52,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-06 23:06:52,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:06:52,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:52,574 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash 145189394, now seen corresponding path program 1 times [2021-12-06 23:06:52,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:52,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499113352] [2021-12-06 23:06:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:52,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:52,612 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 23:06:52,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755139698] [2021-12-06 23:06:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:52,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:52,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:06:52,614 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:06:52,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_424264b7-044c-47cf-a96f-46a7430e9ed2/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process