./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/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_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:13:54,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:13:54,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:13:54,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:13:54,955 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:13:54,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:13:54,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:13:54,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:13:54,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:13:54,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:13:54,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:13:54,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:13:54,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:13:54,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:13:54,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:13:54,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:13:54,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:13:54,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:13:54,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:13:54,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:13:54,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:13:54,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:13:54,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:13:54,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:13:54,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:13:54,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:13:54,986 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:13:54,987 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:13:54,987 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:13:54,988 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:13:54,989 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:13:54,989 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:13:54,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:13:54,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:13:54,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:13:54,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:13:54,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:13:54,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:13:54,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:13:54,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:13:54,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:13:54,995 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-06 22:13:55,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:13:55,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:13:55,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:13:55,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:13:55,018 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:13:55,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:13:55,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:13:55,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:13:55,020 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:13:55,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:13:55,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 22:13:55,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:13:55,020 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:13:55,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:13:55,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:13:55,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:13:55,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:13:55,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:13:55,023 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:13:55,023 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_be1662d6-78ba-4a42-9838-6f30d64b8531/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e757bed859e5dfb8bc677e07409ebb4da6a15dd0898403a302646229a6409be5 [2021-12-06 22:13:55,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:13:55,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:13:55,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:13:55,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:13:55,214 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:13:55,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2021-12-06 22:13:55,256 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/data/263e1b799/8945a6d7f7e74b01858d008203d6fe36/FLAG04f79ce12 [2021-12-06 22:13:55,638 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:13:55,638 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/sv-benchmarks/c/termination-crafted/NestedRecursion_2c.c [2021-12-06 22:13:55,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/data/263e1b799/8945a6d7f7e74b01858d008203d6fe36/FLAG04f79ce12 [2021-12-06 22:13:55,653 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/data/263e1b799/8945a6d7f7e74b01858d008203d6fe36 [2021-12-06 22:13:55,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:13:55,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:13:55,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:13:55,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:13:55,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:13:55,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,661 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3fa2d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55, skipping insertion in model container [2021-12-06 22:13:55,661 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:13:55,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:13:55,781 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:13:55,785 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:13:55,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:13:55,804 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:13:55,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55 WrapperNode [2021-12-06 22:13:55,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:13:55,805 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:13:55,806 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:13:55,806 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:13:55,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,816 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,830 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2021-12-06 22:13:55,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:13:55,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:13:55,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:13:55,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:13:55,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,844 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:13:55,845 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:13:55,845 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:13:55,845 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:13:55,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (1/1) ... [2021-12-06 22:13:55,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:13:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:55,874 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:13:55,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:13:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-12-06 22:13:55,913 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-12-06 22:13:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:13:55,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:13:55,957 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:13:55,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:13:56,035 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:13:56,041 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:13:56,041 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 22:13:56,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:13:56 BoogieIcfgContainer [2021-12-06 22:13:56,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:13:56,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:13:56,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:13:56,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:13:56,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:13:55" (1/3) ... [2021-12-06 22:13:56,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378cb46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:13:56, skipping insertion in model container [2021-12-06 22:13:56,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:13:55" (2/3) ... [2021-12-06 22:13:56,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378cb46f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:13:56, skipping insertion in model container [2021-12-06 22:13:56,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:13:56" (3/3) ... [2021-12-06 22:13:56,049 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2c.c [2021-12-06 22:13:56,053 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:13:56,053 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-06 22:13:56,090 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:13:56,096 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=FINITE_AUTOMATA, 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 22:13:56,096 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-06 22:13:56,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 22:13:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:13:56,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:56,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:56,118 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:56,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:56,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1134721268, now seen corresponding path program 1 times [2021-12-06 22:13:56,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:56,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533905162] [2021-12-06 22:13:56,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:56,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:56,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533905162] [2021-12-06 22:13:56,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533905162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:56,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:56,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:13:56,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024400486] [2021-12-06 22:13:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:56,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:13:56,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:13:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:13:56,297 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:56,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:56,375 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-06 22:13:56,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:13:56,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-06 22:13:56,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:56,383 INFO L225 Difference]: With dead ends: 42 [2021-12-06 22:13:56,383 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 22:13:56,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:13:56,388 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:56,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 22:13:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-12-06 22:13:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-06 22:13:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-06 22:13:56,420 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2021-12-06 22:13:56,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:56,421 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-06 22:13:56,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:56,421 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-06 22:13:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 22:13:56,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:56,422 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:56,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:13:56,422 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:56,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash 816620978, now seen corresponding path program 1 times [2021-12-06 22:13:56,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:56,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711902763] [2021-12-06 22:13:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:56,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:56,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:56,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711902763] [2021-12-06 22:13:56,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711902763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:56,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:56,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:13:56,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735113403] [2021-12-06 22:13:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:56,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:13:56,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:13:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:13:56,455 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:56,500 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-12-06 22:13:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:13:56,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 22:13:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:56,502 INFO L225 Difference]: With dead ends: 51 [2021-12-06 22:13:56,502 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 22:13:56,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:13:56,504 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:56,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:56,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 22:13:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-06 22:13:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 22:13:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-06 22:13:56,514 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2021-12-06 22:13:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:56,514 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-06 22:13:56,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-06 22:13:56,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:13:56,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:56,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:56,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:13:56,515 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:56,516 INFO L85 PathProgramCache]: Analyzing trace with hash 496687761, now seen corresponding path program 1 times [2021-12-06 22:13:56,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:56,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218044506] [2021-12-06 22:13:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:56,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:56,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218044506] [2021-12-06 22:13:56,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218044506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:56,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316553165] [2021-12-06 22:13:56,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:56,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:56,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:56,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:56,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:13:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:13:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:56,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:56,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316553165] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:56,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:56,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-06 22:13:56,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928838465] [2021-12-06 22:13:56,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:56,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 22:13:56,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 22:13:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:13:56,718 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:56,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:56,849 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-06 22:13:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:13:56,849 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 22:13:56,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:56,851 INFO L225 Difference]: With dead ends: 96 [2021-12-06 22:13:56,851 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 22:13:56,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:13:56,853 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:56,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 116 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:13:56,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 22:13:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-12-06 22:13:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 59 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 22:13:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2021-12-06 22:13:56,867 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 13 [2021-12-06 22:13:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:56,867 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2021-12-06 22:13:56,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2021-12-06 22:13:56,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 22:13:56,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:56,868 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:56,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:13:57,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:57,070 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:57,072 INFO L85 PathProgramCache]: Analyzing trace with hash 574996991, now seen corresponding path program 1 times [2021-12-06 22:13:57,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:57,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85455449] [2021-12-06 22:13:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:57,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:57,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85455449] [2021-12-06 22:13:57,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85455449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:57,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:57,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:13:57,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388664423] [2021-12-06 22:13:57,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:57,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:13:57,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:13:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:13:57,174 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:57,208 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2021-12-06 22:13:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:13:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-06 22:13:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:57,213 INFO L225 Difference]: With dead ends: 77 [2021-12-06 22:13:57,213 INFO L226 Difference]: Without dead ends: 76 [2021-12-06 22:13:57,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 22:13:57,216 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:57,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:57,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-06 22:13:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-12-06 22:13:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 55 states have (on average 1.2545454545454546) internal successors, (69), 58 states have internal predecessors, (69), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 22:13:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2021-12-06 22:13:57,240 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 15 [2021-12-06 22:13:57,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:57,240 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2021-12-06 22:13:57,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,241 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2021-12-06 22:13:57,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:13:57,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:57,242 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:57,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:13:57,242 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:57,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:57,243 INFO L85 PathProgramCache]: Analyzing trace with hash 645037581, now seen corresponding path program 1 times [2021-12-06 22:13:57,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:57,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350774532] [2021-12-06 22:13:57,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:57,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350774532] [2021-12-06 22:13:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350774532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:57,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:13:57,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882483804] [2021-12-06 22:13:57,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:13:57,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:13:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:13:57,280 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:57,296 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-12-06 22:13:57,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:13:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-06 22:13:57,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:57,298 INFO L225 Difference]: With dead ends: 116 [2021-12-06 22:13:57,298 INFO L226 Difference]: Without dead ends: 115 [2021-12-06 22:13:57,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:13:57,300 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:57,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 52 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-12-06 22:13:57,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2021-12-06 22:13:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 80 states have internal predecessors, (92), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-06 22:13:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2021-12-06 22:13:57,313 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 16 [2021-12-06 22:13:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:57,314 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2021-12-06 22:13:57,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,314 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2021-12-06 22:13:57,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 22:13:57,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:57,314 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:57,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:13:57,315 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:57,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1915238450, now seen corresponding path program 1 times [2021-12-06 22:13:57,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:57,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368248963] [2021-12-06 22:13:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:57,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:57,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:57,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368248963] [2021-12-06 22:13:57,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368248963] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:57,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:57,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:13:57,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798525610] [2021-12-06 22:13:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:57,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:13:57,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:57,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:13:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:13:57,352 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:57,419 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2021-12-06 22:13:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:13:57,420 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-06 22:13:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:57,421 INFO L225 Difference]: With dead ends: 137 [2021-12-06 22:13:57,421 INFO L226 Difference]: Without dead ends: 136 [2021-12-06 22:13:57,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:13:57,423 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:57,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-06 22:13:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-12-06 22:13:57,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 100 states have internal predecessors, (108), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) [2021-12-06 22:13:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2021-12-06 22:13:57,439 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 20 [2021-12-06 22:13:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:57,440 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2021-12-06 22:13:57,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2021-12-06 22:13:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-06 22:13:57,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:57,441 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:57,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:13:57,442 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash 757150232, now seen corresponding path program 1 times [2021-12-06 22:13:57,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:57,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973207591] [2021-12-06 22:13:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:57,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:57,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973207591] [2021-12-06 22:13:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973207591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:57,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:57,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:13:57,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916768575] [2021-12-06 22:13:57,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:57,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:13:57,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:13:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:13:57,479 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:57,540 INFO L93 Difference]: Finished difference Result 155 states and 200 transitions. [2021-12-06 22:13:57,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:13:57,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-06 22:13:57,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:57,542 INFO L225 Difference]: With dead ends: 155 [2021-12-06 22:13:57,542 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 22:13:57,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:13:57,544 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:57,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 89 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 22:13:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 144. [2021-12-06 22:13:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 112 states have internal predecessors, (122), 25 states have call successors, (25), 8 states have call predecessors, (25), 13 states have return successors, (37), 23 states have call predecessors, (37), 22 states have call successors, (37) [2021-12-06 22:13:57,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 184 transitions. [2021-12-06 22:13:57,564 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 184 transitions. Word has length 21 [2021-12-06 22:13:57,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:57,564 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 184 transitions. [2021-12-06 22:13:57,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:13:57,565 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 184 transitions. [2021-12-06 22:13:57,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 22:13:57,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:57,566 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:57,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:13:57,566 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1579949547, now seen corresponding path program 2 times [2021-12-06 22:13:57,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:57,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239428485] [2021-12-06 22:13:57,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:57,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239428485] [2021-12-06 22:13:57,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239428485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:57,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059791910] [2021-12-06 22:13:57,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:13:57,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:57,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:57,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:57,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:13:57,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:13:57,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:57,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 22:13:57,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:57,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059791910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:57,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:57,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 22:13:57,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37086931] [2021-12-06 22:13:57,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:57,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:13:57,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:57,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:13:57,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:13:57,747 INFO L87 Difference]: Start difference. First operand 144 states and 184 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:13:57,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:57,939 INFO L93 Difference]: Finished difference Result 215 states and 277 transitions. [2021-12-06 22:13:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:13:57,939 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-06 22:13:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:57,941 INFO L225 Difference]: With dead ends: 215 [2021-12-06 22:13:57,941 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 22:13:57,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:13:57,942 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 148 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:57,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 150 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:13:57,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 22:13:57,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 198. [2021-12-06 22:13:57,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 142 states have (on average 1.176056338028169) internal successors, (167), 154 states have internal predecessors, (167), 34 states have call successors, (34), 11 states have call predecessors, (34), 19 states have return successors, (52), 32 states have call predecessors, (52), 31 states have call successors, (52) [2021-12-06 22:13:57,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 253 transitions. [2021-12-06 22:13:57,959 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 253 transitions. Word has length 26 [2021-12-06 22:13:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:57,959 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 253 transitions. [2021-12-06 22:13:57,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:13:57,959 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 253 transitions. [2021-12-06 22:13:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 22:13:57,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:57,961 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-12-06 22:13:57,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:13:58,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:58,163 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1990306702, now seen corresponding path program 2 times [2021-12-06 22:13:58,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:58,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469103448] [2021-12-06 22:13:58,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:58,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:58,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:58,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469103448] [2021-12-06 22:13:58,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469103448] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:58,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193492854] [2021-12-06 22:13:58,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:13:58,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:58,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:58,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:58,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:13:58,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:13:58,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:58,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:13:58,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:58,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:13:58,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193492854] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:58,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:58,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-06 22:13:58,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341088360] [2021-12-06 22:13:58,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 22:13:58,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:58,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 22:13:58,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-06 22:13:58,518 INFO L87 Difference]: Start difference. First operand 198 states and 253 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:58,825 INFO L93 Difference]: Finished difference Result 319 states and 414 transitions. [2021-12-06 22:13:58,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-06 22:13:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-06 22:13:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:58,827 INFO L225 Difference]: With dead ends: 319 [2021-12-06 22:13:58,827 INFO L226 Difference]: Without dead ends: 318 [2021-12-06 22:13:58,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 22:13:58,829 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 463 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:58,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 202 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:13:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-12-06 22:13:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 306. [2021-12-06 22:13:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 238 states have internal predecessors, (257), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2021-12-06 22:13:58,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 391 transitions. [2021-12-06 22:13:58,847 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 391 transitions. Word has length 28 [2021-12-06 22:13:58,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:58,847 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 391 transitions. [2021-12-06 22:13:58,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:13:58,848 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 391 transitions. [2021-12-06 22:13:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 22:13:58,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:58,849 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:58,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:13:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:59,050 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:59,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:59,051 INFO L85 PathProgramCache]: Analyzing trace with hash 375182260, now seen corresponding path program 1 times [2021-12-06 22:13:59,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:59,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345130585] [2021-12-06 22:13:59,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:59,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:13:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:13:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:13:59,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:59,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345130585] [2021-12-06 22:13:59,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345130585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:59,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:59,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:13:59,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874902244] [2021-12-06 22:13:59,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:59,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:13:59,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:59,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:13:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:13:59,208 INFO L87 Difference]: Start difference. First operand 306 states and 391 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:13:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:59,239 INFO L93 Difference]: Finished difference Result 306 states and 391 transitions. [2021-12-06 22:13:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:13:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-12-06 22:13:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:59,243 INFO L225 Difference]: With dead ends: 306 [2021-12-06 22:13:59,243 INFO L226 Difference]: Without dead ends: 305 [2021-12-06 22:13:59,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:13:59,244 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:59,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:59,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-06 22:13:59,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2021-12-06 22:13:59,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 220 states have (on average 1.0909090909090908) internal successors, (240), 237 states have internal predecessors, (240), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2021-12-06 22:13:59,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 374 transitions. [2021-12-06 22:13:59,268 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 374 transitions. Word has length 32 [2021-12-06 22:13:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:59,268 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 374 transitions. [2021-12-06 22:13:59,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:13:59,269 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 374 transitions. [2021-12-06 22:13:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:13:59,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:59,271 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:59,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:13:59,271 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:59,272 INFO L85 PathProgramCache]: Analyzing trace with hash 801174005, now seen corresponding path program 1 times [2021-12-06 22:13:59,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:59,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958473469] [2021-12-06 22:13:59,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:59,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:59,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:13:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:13:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:13:59,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:59,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958473469] [2021-12-06 22:13:59,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958473469] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:59,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:59,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:13:59,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130414431] [2021-12-06 22:13:59,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:59,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:13:59,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:59,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:13:59,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:13:59,321 INFO L87 Difference]: Start difference. First operand 305 states and 374 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:13:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:59,385 INFO L93 Difference]: Finished difference Result 306 states and 374 transitions. [2021-12-06 22:13:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 22:13:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-12-06 22:13:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:59,389 INFO L225 Difference]: With dead ends: 306 [2021-12-06 22:13:59,389 INFO L226 Difference]: Without dead ends: 305 [2021-12-06 22:13:59,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:13:59,390 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:59,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 72 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-12-06 22:13:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2021-12-06 22:13:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 220 states have (on average 1.0863636363636364) internal successors, (239), 236 states have internal predecessors, (239), 52 states have call successors, (52), 17 states have call predecessors, (52), 31 states have return successors, (82), 50 states have call predecessors, (82), 49 states have call successors, (82) [2021-12-06 22:13:59,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 373 transitions. [2021-12-06 22:13:59,417 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 373 transitions. Word has length 36 [2021-12-06 22:13:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:59,418 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 373 transitions. [2021-12-06 22:13:59,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:13:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 373 transitions. [2021-12-06 22:13:59,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 22:13:59,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:59,420 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:59,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:13:59,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:59,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:59,421 INFO L85 PathProgramCache]: Analyzing trace with hash -933409583, now seen corresponding path program 1 times [2021-12-06 22:13:59,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:59,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288778555] [2021-12-06 22:13:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:59,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:13:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:13:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:13:59,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:59,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288778555] [2021-12-06 22:13:59,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288778555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:13:59,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:13:59,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:13:59,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667808367] [2021-12-06 22:13:59,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:13:59,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:13:59,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:59,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:13:59,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:13:59,471 INFO L87 Difference]: Start difference. First operand 304 states and 373 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:13:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:13:59,532 INFO L93 Difference]: Finished difference Result 323 states and 396 transitions. [2021-12-06 22:13:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:13:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-06 22:13:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:13:59,534 INFO L225 Difference]: With dead ends: 323 [2021-12-06 22:13:59,535 INFO L226 Difference]: Without dead ends: 322 [2021-12-06 22:13:59,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:13:59,536 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:13:59,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:13:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-06 22:13:59,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 320. [2021-12-06 22:13:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 232 states have (on average 1.0862068965517242) internal successors, (252), 248 states have internal predecessors, (252), 55 states have call successors, (55), 18 states have call predecessors, (55), 32 states have return successors, (70), 53 states have call predecessors, (70), 52 states have call successors, (70) [2021-12-06 22:13:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 377 transitions. [2021-12-06 22:13:59,551 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 377 transitions. Word has length 37 [2021-12-06 22:13:59,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:13:59,551 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 377 transitions. [2021-12-06 22:13:59,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:13:59,552 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 377 transitions. [2021-12-06 22:13:59,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 22:13:59,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:13:59,553 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:13:59,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:13:59,553 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:13:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:13:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1862709720, now seen corresponding path program 3 times [2021-12-06 22:13:59,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:13:59,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666206334] [2021-12-06 22:13:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:13:59,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:13:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:13:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:13:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:59,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:13:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666206334] [2021-12-06 22:13:59,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666206334] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:13:59,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865644859] [2021-12-06 22:13:59,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:13:59,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:13:59,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:13:59,629 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:13:59,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:13:59,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 22:13:59,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:13:59,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:13:59,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:13:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:59,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:13:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:13:59,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865644859] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:13:59,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:13:59,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 22:13:59,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637773437] [2021-12-06 22:13:59,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:13:59,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:13:59,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:13:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:13:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:13:59,887 INFO L87 Difference]: Start difference. First operand 320 states and 377 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:14:00,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:00,425 INFO L93 Difference]: Finished difference Result 456 states and 580 transitions. [2021-12-06 22:14:00,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:14:00,426 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2021-12-06 22:14:00,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:00,429 INFO L225 Difference]: With dead ends: 456 [2021-12-06 22:14:00,429 INFO L226 Difference]: Without dead ends: 455 [2021-12-06 22:14:00,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=900, Invalid=2406, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 22:14:00,432 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 451 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:00,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 236 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:14:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-12-06 22:14:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 428. [2021-12-06 22:14:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 310 states have (on average 1.0838709677419356) internal successors, (336), 332 states have internal predecessors, (336), 73 states have call successors, (73), 24 states have call predecessors, (73), 44 states have return successors, (94), 71 states have call predecessors, (94), 70 states have call successors, (94) [2021-12-06 22:14:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 503 transitions. [2021-12-06 22:14:00,457 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 503 transitions. Word has length 41 [2021-12-06 22:14:00,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:00,458 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 503 transitions. [2021-12-06 22:14:00,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 22:14:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 503 transitions. [2021-12-06 22:14:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 22:14:00,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:00,459 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:00,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:14:00,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 22:14:00,661 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:00,662 INFO L85 PathProgramCache]: Analyzing trace with hash 35704530, now seen corresponding path program 2 times [2021-12-06 22:14:00,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:00,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108472348] [2021-12-06 22:14:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:00,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:00,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:14:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:00,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:14:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:00,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:14:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:00,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:00,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108472348] [2021-12-06 22:14:00,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108472348] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:00,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567809694] [2021-12-06 22:14:00,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:14:00,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:00,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:00,828 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:00,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:14:00,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:14:00,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:14:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:00,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:01,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567809694] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:01,004 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:01,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-06 22:14:01,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299318198] [2021-12-06 22:14:01,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:01,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:14:01,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:01,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:14:01,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:14:01,005 INFO L87 Difference]: Start difference. First operand 428 states and 503 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 10 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:14:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:01,243 INFO L93 Difference]: Finished difference Result 483 states and 569 transitions. [2021-12-06 22:14:01,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 22:14:01,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 10 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-12-06 22:14:01,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:01,246 INFO L225 Difference]: With dead ends: 483 [2021-12-06 22:14:01,246 INFO L226 Difference]: Without dead ends: 482 [2021-12-06 22:14:01,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=350, Invalid=1132, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 22:14:01,248 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:01,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 137 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:14:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-12-06 22:14:01,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-12-06 22:14:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 349 states have (on average 1.0830945558739256) internal successors, (378), 374 states have internal predecessors, (378), 82 states have call successors, (82), 27 states have call predecessors, (82), 50 states have return successors, (106), 80 states have call predecessors, (106), 79 states have call successors, (106) [2021-12-06 22:14:01,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 566 transitions. [2021-12-06 22:14:01,265 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 566 transitions. Word has length 42 [2021-12-06 22:14:01,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:01,265 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 566 transitions. [2021-12-06 22:14:01,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 10 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:14:01,266 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 566 transitions. [2021-12-06 22:14:01,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 22:14:01,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:01,268 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-12-06 22:14:01,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:14:01,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 22:14:01,469 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:01,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:01,471 INFO L85 PathProgramCache]: Analyzing trace with hash 235894418, now seen corresponding path program 3 times [2021-12-06 22:14:01,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:01,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582475992] [2021-12-06 22:14:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:01,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:01,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582475992] [2021-12-06 22:14:01,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582475992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:01,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925602058] [2021-12-06 22:14:01,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:14:01,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:01,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:01,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:14:01,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-06 22:14:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:01,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:14:01,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:01,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925602058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:02,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:02,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-06 22:14:02,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262920932] [2021-12-06 22:14:02,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:02,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:14:02,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:14:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:14:02,124 INFO L87 Difference]: Start difference. First operand 482 states and 566 transitions. Second operand has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:02,826 INFO L93 Difference]: Finished difference Result 703 states and 908 transitions. [2021-12-06 22:14:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-12-06 22:14:02,827 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-06 22:14:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:02,830 INFO L225 Difference]: With dead ends: 703 [2021-12-06 22:14:02,830 INFO L226 Difference]: Without dead ends: 702 [2021-12-06 22:14:02,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 22:14:02,833 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 922 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:02,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 409 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:14:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-06 22:14:02,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 698. [2021-12-06 22:14:02,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 505 states have (on average 1.0811881188118813) internal successors, (546), 542 states have internal predecessors, (546), 118 states have call successors, (118), 39 states have call predecessors, (118), 74 states have return successors, (154), 116 states have call predecessors, (154), 115 states have call successors, (154) [2021-12-06 22:14:02,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 818 transitions. [2021-12-06 22:14:02,862 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 818 transitions. Word has length 58 [2021-12-06 22:14:02,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:02,863 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 818 transitions. [2021-12-06 22:14:02,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:02,863 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 818 transitions. [2021-12-06 22:14:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 22:14:02,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:02,865 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:02,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:14:03,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:14:03,065 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:03,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1212467695, now seen corresponding path program 3 times [2021-12-06 22:14:03,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:03,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75040269] [2021-12-06 22:14:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:03,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:03,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:03,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:14:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:03,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:14:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:03,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:14:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:03,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:03,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75040269] [2021-12-06 22:14:03,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75040269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:03,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075827686] [2021-12-06 22:14:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:14:03,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:03,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:03,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:14:03,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 22:14:03,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:03,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 22:14:03,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:03,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 76 proven. 46 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:03,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075827686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:03,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:03,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2021-12-06 22:14:03,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698256470] [2021-12-06 22:14:03,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:03,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 22:14:03,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:03,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 22:14:03,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:14:03,397 INFO L87 Difference]: Start difference. First operand 698 states and 818 transitions. Second operand has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 16 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:14:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:03,985 INFO L93 Difference]: Finished difference Result 807 states and 950 transitions. [2021-12-06 22:14:03,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 22:14:03,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 16 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2021-12-06 22:14:03,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:03,990 INFO L225 Difference]: With dead ends: 807 [2021-12-06 22:14:03,991 INFO L226 Difference]: Without dead ends: 806 [2021-12-06 22:14:03,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1612 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1544, Invalid=4936, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 22:14:03,994 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 328 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:03,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 113 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:14:03,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-06 22:14:04,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 410. [2021-12-06 22:14:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 307 states have (on average 1.1140065146579805) internal successors, (342), 308 states have internal predecessors, (342), 69 states have call successors, (69), 34 states have call predecessors, (69), 33 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2021-12-06 22:14:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 478 transitions. [2021-12-06 22:14:04,020 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 478 transitions. Word has length 57 [2021-12-06 22:14:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:04,020 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 478 transitions. [2021-12-06 22:14:04,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 16 states have internal predecessors, (64), 11 states have call successors, (13), 11 states have call predecessors, (13), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:14:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 478 transitions. [2021-12-06 22:14:04,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 22:14:04,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:04,022 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:04,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:14:04,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:04,223 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:04,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2093556360, now seen corresponding path program 4 times [2021-12-06 22:14:04,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:04,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112322732] [2021-12-06 22:14:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:04,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:04,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:04,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:14:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 76 proven. 265 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:14:04,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:04,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112322732] [2021-12-06 22:14:04,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112322732] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:04,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151171854] [2021-12-06 22:14:04,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:14:04,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:04,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:04,415 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:04,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:14:04,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:14:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:04,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 22:14:04,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-12-06 22:14:04,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:04,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151171854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:04,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:14:04,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [25] total 30 [2021-12-06 22:14:04,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778550468] [2021-12-06 22:14:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:04,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:14:04,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:14:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=679, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:14:04,515 INFO L87 Difference]: Start difference. First operand 410 states and 478 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:14:04,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:04,560 INFO L93 Difference]: Finished difference Result 940 states and 1197 transitions. [2021-12-06 22:14:04,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:14:04,560 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-12-06 22:14:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:04,564 INFO L225 Difference]: With dead ends: 940 [2021-12-06 22:14:04,564 INFO L226 Difference]: Without dead ends: 643 [2021-12-06 22:14:04,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:14:04,569 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:04,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 69 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:14:04,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-12-06 22:14:04,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 608. [2021-12-06 22:14:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 440 states have (on average 1.0772727272727274) internal successors, (474), 472 states have internal predecessors, (474), 102 states have call successors, (102), 35 states have call predecessors, (102), 65 states have return successors, (133), 100 states have call predecessors, (133), 100 states have call successors, (133) [2021-12-06 22:14:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 709 transitions. [2021-12-06 22:14:04,603 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 709 transitions. Word has length 71 [2021-12-06 22:14:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 709 transitions. [2021-12-06 22:14:04,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 22:14:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 709 transitions. [2021-12-06 22:14:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 22:14:04,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:04,607 INFO L514 BasicCegarLoop]: trace histogram [15, 13, 13, 12, 12, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:04,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:14:04,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:14:04,807 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:04,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1208023025, now seen corresponding path program 4 times [2021-12-06 22:14:04,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:04,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426089739] [2021-12-06 22:14:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:04,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:04,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:14:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:04,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:14:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:04,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:14:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 160 proven. 265 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:04,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:04,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426089739] [2021-12-06 22:14:04,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426089739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:04,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252045567] [2021-12-06 22:14:04,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:14:04,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:04,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:04,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:05,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:14:05,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:14:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 22:14:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 160 proven. 265 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:05,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 160 proven. 265 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:05,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252045567] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:05,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:05,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-06 22:14:05,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854224256] [2021-12-06 22:14:05,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:05,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 22:14:05,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:05,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 22:14:05,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=2086, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:14:05,489 INFO L87 Difference]: Start difference. First operand 608 states and 709 transitions. Second operand has 52 states, 51 states have (on average 2.196078431372549) internal successors, (112), 28 states have internal predecessors, (112), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:14:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:07,118 INFO L93 Difference]: Finished difference Result 825 states and 973 transitions. [2021-12-06 22:14:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-12-06 22:14:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.196078431372549) internal successors, (112), 28 states have internal predecessors, (112), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 87 [2021-12-06 22:14:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:07,122 INFO L225 Difference]: With dead ends: 825 [2021-12-06 22:14:07,122 INFO L226 Difference]: Without dead ends: 824 [2021-12-06 22:14:07,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7864 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=6524, Invalid=20536, Unknown=0, NotChecked=0, Total=27060 [2021-12-06 22:14:07,129 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 802 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 503 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 503 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:07,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 204 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [503 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:14:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2021-12-06 22:14:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2021-12-06 22:14:07,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 596 states have (on average 1.0771812080536913) internal successors, (642), 640 states have internal predecessors, (642), 138 states have call successors, (138), 47 states have call predecessors, (138), 89 states have return successors, (181), 136 states have call predecessors, (181), 136 states have call successors, (181) [2021-12-06 22:14:07,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 961 transitions. [2021-12-06 22:14:07,156 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 961 transitions. Word has length 87 [2021-12-06 22:14:07,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:07,156 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 961 transitions. [2021-12-06 22:14:07,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.196078431372549) internal successors, (112), 28 states have internal predecessors, (112), 23 states have call successors, (25), 23 states have call predecessors, (25), 3 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-06 22:14:07,157 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 961 transitions. [2021-12-06 22:14:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 22:14:07,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:07,160 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-12-06 22:14:07,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:14:07,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:14:07,362 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:07,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash -102214958, now seen corresponding path program 4 times [2021-12-06 22:14:07,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166851996] [2021-12-06 22:14:07,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:07,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:07,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:07,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166851996] [2021-12-06 22:14:07,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166851996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:07,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608449503] [2021-12-06 22:14:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:14:07,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:07,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:07,920 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:07,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:14:07,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:14:07,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:07,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-06 22:14:07,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:08,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:08,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:09,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608449503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:09,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:09,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-06 22:14:09,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355263394] [2021-12-06 22:14:09,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:09,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-06 22:14:09,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:09,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-06 22:14:09,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-06 22:14:09,088 INFO L87 Difference]: Start difference. First operand 824 states and 961 transitions. Second operand has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:11,456 INFO L93 Difference]: Finished difference Result 1259 states and 1559 transitions. [2021-12-06 22:14:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-12-06 22:14:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-06 22:14:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:11,462 INFO L225 Difference]: With dead ends: 1259 [2021-12-06 22:14:11,462 INFO L226 Difference]: Without dead ends: 1258 [2021-12-06 22:14:11,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=10631, Invalid=23779, Unknown=0, NotChecked=0, Total=34410 [2021-12-06 22:14:11,465 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1899 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 1094 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 2436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1094 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:11,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1903 Valid, 845 Invalid, 2436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1094 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:14:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-12-06 22:14:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1256. [2021-12-06 22:14:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 908 states have (on average 1.077092511013216) internal successors, (978), 976 states have internal predecessors, (978), 210 states have call successors, (210), 71 states have call predecessors, (210), 137 states have return successors, (277), 208 states have call predecessors, (277), 208 states have call successors, (277) [2021-12-06 22:14:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1465 transitions. [2021-12-06 22:14:11,505 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1465 transitions. Word has length 118 [2021-12-06 22:14:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:11,505 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1465 transitions. [2021-12-06 22:14:11,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1465 transitions. [2021-12-06 22:14:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:14:11,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:11,509 INFO L514 BasicCegarLoop]: trace histogram [27, 25, 25, 24, 24, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:14:11,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:14:11,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:11,711 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1138811825, now seen corresponding path program 5 times [2021-12-06 22:14:11,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:11,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989064862] [2021-12-06 22:14:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:11,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:12,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 22:14:12,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-06 22:14:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:14:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 328 proven. 1243 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 22:14:12,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989064862] [2021-12-06 22:14:12,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989064862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922332083] [2021-12-06 22:14:12,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:14:12,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:12,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:12,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:12,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:14:12,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-12-06 22:14:12,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:12,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 22:14:12,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1588 backedges. 372 proven. 0 refuted. 0 times theorem prover too weak. 1216 trivial. 0 not checked. [2021-12-06 22:14:12,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:14:12,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922332083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:14:12,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:14:12,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [50] total 56 [2021-12-06 22:14:12,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508654278] [2021-12-06 22:14:12,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:14:12,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:14:12,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:12,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:14:12,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2416, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 22:14:12,450 INFO L87 Difference]: Start difference. First operand 1256 states and 1465 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:14:12,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:12,500 INFO L93 Difference]: Finished difference Result 1591 states and 1891 transitions. [2021-12-06 22:14:12,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:14:12,501 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 147 [2021-12-06 22:14:12,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:12,502 INFO L225 Difference]: With dead ends: 1591 [2021-12-06 22:14:12,502 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 22:14:12,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=802, Invalid=2738, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 22:14:12,509 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:12,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 74 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:14:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 22:14:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-12-06 22:14:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-12-06 22:14:12,519 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 147 [2021-12-06 22:14:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:12,519 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-12-06 22:14:12,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-06 22:14:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-12-06 22:14:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 22:14:12,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:12,523 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2021-12-06 22:14:12,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:14:12,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:12,723 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:12,724 INFO L85 PathProgramCache]: Analyzing trace with hash -827561134, now seen corresponding path program 5 times [2021-12-06 22:14:12,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:12,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081768947] [2021-12-06 22:14:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:12,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:14,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:14,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081768947] [2021-12-06 22:14:14,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081768947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:14,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923783990] [2021-12-06 22:14:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:14:14,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:14,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:14,286 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:14,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:14:14,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-06 22:14:14,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:14,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 22:14:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:14,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:18,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923783990] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:18,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:18,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-12-06 22:14:18,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987235405] [2021-12-06 22:14:18,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:18,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-12-06 22:14:18,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:18,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-12-06 22:14:18,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2021-12-06 22:14:18,497 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:14:22,695 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2021-12-06 22:14:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-06 22:14:22,696 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-12-06 22:14:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:14:22,698 INFO L225 Difference]: With dead ends: 481 [2021-12-06 22:14:22,698 INFO L226 Difference]: Without dead ends: 480 [2021-12-06 22:14:22,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2021-12-06 22:14:22,702 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1217 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:14:22,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 87 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:14:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-06 22:14:22,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2021-12-06 22:14:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 383 states have (on average 1.0026109660574412) internal successors, (384), 383 states have internal predecessors, (384), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2021-12-06 22:14:22,714 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 238 [2021-12-06 22:14:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:14:22,714 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2021-12-06 22:14:22,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:14:22,715 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2021-12-06 22:14:22,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-12-06 22:14:22,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:14:22,720 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1, 1] [2021-12-06 22:14:22,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:14:22,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 22:14:22,921 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:14:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:14:22,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1782455378, now seen corresponding path program 6 times [2021-12-06 22:14:22,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:14:22,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881124284] [2021-12-06 22:14:22,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:14:22,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:14:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:14:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:28,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:14:28,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881124284] [2021-12-06 22:14:28,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881124284] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:14:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936865148] [2021-12-06 22:14:28,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:14:28,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:14:28,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:14:28,521 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:14:28,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:14:28,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-12-06 22:14:28,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:14:28,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-06 22:14:28,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:14:29,306 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:29,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:14:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:14:43,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936865148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:14:43,843 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:14:43,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-12-06 22:14:43,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214749259] [2021-12-06 22:14:43,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:14:43,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-12-06 22:14:43,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:14:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-12-06 22:14:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2021-12-06 22:14:43,856 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:08,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:15:08,875 INFO L93 Difference]: Finished difference Result 961 states and 1056 transitions. [2021-12-06 22:15:08,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-12-06 22:15:08,876 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 478 [2021-12-06 22:15:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:15:08,880 INFO L225 Difference]: With dead ends: 961 [2021-12-06 22:15:08,880 INFO L226 Difference]: Without dead ends: 960 [2021-12-06 22:15:08,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1336 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2021-12-06 22:15:08,898 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4366 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4366 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:15:08,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4366 Valid, 56 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-06 22:15:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-12-06 22:15:08,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 959. [2021-12-06 22:15:08,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 767 states have (on average 1.001303780964798) internal successors, (768), 767 states have internal predecessors, (768), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 959 transitions. [2021-12-06 22:15:08,922 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 959 transitions. Word has length 478 [2021-12-06 22:15:08,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:15:08,922 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 959 transitions. [2021-12-06 22:15:08,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:15:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 959 transitions. [2021-12-06 22:15:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-12-06 22:15:08,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:15:08,930 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1, 1] [2021-12-06 22:15:08,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:15:09,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 22:15:09,131 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:15:09,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:15:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1752727982, now seen corresponding path program 7 times [2021-12-06 22:15:09,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:15:09,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931289152] [2021-12-06 22:15:09,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:15:09,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:15:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:31,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:15:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931289152] [2021-12-06 22:15:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931289152] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:15:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215059358] [2021-12-06 22:15:31,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:15:31,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:15:31,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:15:31,868 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:15:31,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:15:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:15:32,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 384 conjunts are in the unsatisfiable core [2021-12-06 22:15:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:15:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:15:33,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:16:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:16:31,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215059358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:16:31,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:16:31,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-12-06 22:16:31,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633015078] [2021-12-06 22:16:31,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:16:31,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-12-06 22:16:31,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:16:31,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-12-06 22:16:31,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2021-12-06 22:16:31,631 INFO L87 Difference]: Start difference. First operand 959 states and 959 transitions. Second operand has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:20:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:20:29,123 INFO L93 Difference]: Finished difference Result 1921 states and 2112 transitions. [2021-12-06 22:20:29,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-12-06 22:20:29,124 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 958 [2021-12-06 22:20:29,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:20:29,133 INFO L225 Difference]: With dead ends: 1921 [2021-12-06 22:20:29,133 INFO L226 Difference]: Without dead ends: 1920 [2021-12-06 22:20:29,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2680 GetRequests, 1532 SyntacticMatches, 0 SemanticMatches, 1148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291084 ImplicationChecksByTransitivity, 122.4s TimeCoverageRelationStatistics Valid=366917, Invalid=954433, Unknown=0, NotChecked=0, Total=1321350 [2021-12-06 22:20:29,228 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7969 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 3464 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7969 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 3662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 3464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:20:29,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7969 Valid, 71 Invalid, 3662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 3464 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 22:20:29,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-12-06 22:20:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1919. [2021-12-06 22:20:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1535 states have (on average 1.0006514657980456) internal successors, (1536), 1535 states have internal predecessors, (1536), 383 states have call successors, (383), 383 states have call predecessors, (383), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:20:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 1919 transitions. [2021-12-06 22:20:29,279 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 1919 transitions. Word has length 958 [2021-12-06 22:20:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:20:29,280 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 1919 transitions. [2021-12-06 22:20:29,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:20:29,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 1919 transitions. [2021-12-06 22:20:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1919 [2021-12-06 22:20:29,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:20:29,305 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 382, 382, 1, 1, 1, 1, 1] [2021-12-06 22:20:29,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:20:29,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:20:29,506 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-06 22:20:29,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:20:29,507 INFO L85 PathProgramCache]: Analyzing trace with hash 984760914, now seen corresponding path program 8 times [2021-12-06 22:20:29,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:20:29,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711485456] [2021-12-06 22:20:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:20:29,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:20:31,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:22:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 365383 backedges. 0 proven. 365383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:22:00,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:22:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711485456] [2021-12-06 22:22:00,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711485456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:22:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815495355] [2021-12-06 22:22:00,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:22:00,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:22:00,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:22:00,695 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:22:00,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be1662d6-78ba-4a42-9838-6f30d64b8531/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:22:01,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:22:01,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:22:01,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 3453 conjuncts, 768 conjunts are in the unsatisfiable core [2021-12-06 22:22:01,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:22:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 365383 backedges. 0 proven. 365383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:22:02,964 INFO L328 TraceCheckSpWp]: Computing backward predicates...