./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ --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 32bit --witnessprinter.graph.data.programhash 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:47:05,718 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:47:05,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:47:05,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:47:05,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:47:05,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:47:05,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:47:05,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:47:05,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:47:05,778 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:47:05,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:47:05,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:47:05,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:47:05,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:47:05,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:47:05,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:47:05,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:47:05,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:47:05,791 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:47:05,794 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:47:05,796 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:47:05,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:47:05,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:47:05,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:47:05,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:47:05,807 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:47:05,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:47:05,808 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:47:05,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:47:05,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:47:05,811 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:47:05,812 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:47:05,813 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:47:05,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:47:05,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:47:05,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:47:05,818 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:47:05,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:47:05,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:47:05,820 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:47:05,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:47:05,829 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-10-17 10:47:05,879 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:47:05,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:47:05,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:47:05,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:47:05,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:47:05,885 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:47:05,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:47:05,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:47:05,886 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:47:05,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:47:05,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:47:05,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:47:05,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:47:05,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:47:05,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:47:05,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:47:05,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:47:05,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:47:05,890 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-10-17 10:47:05,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:47:05,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:47:05,891 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:47:05,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:47:05,891 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:47:05,891 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:47:05,891 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:47:05,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:47:05,892 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:47:05,892 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:47:05,892 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:47:05,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:47:05,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:47:05,893 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:47:05,894 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_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2022-10-17 10:47:06,203 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:47:06,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:47:06,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:47:06,235 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:47:06,236 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:47:06,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2022-10-17 10:47:06,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/data/710d922b3/2415922a24554c96b7a6065a0da92938/FLAG1e355a9cf [2022-10-17 10:47:06,770 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:47:06,771 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/sv-benchmarks/c/recursive/Ackermann01-2.c [2022-10-17 10:47:06,778 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/data/710d922b3/2415922a24554c96b7a6065a0da92938/FLAG1e355a9cf [2022-10-17 10:47:07,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/data/710d922b3/2415922a24554c96b7a6065a0da92938 [2022-10-17 10:47:07,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:47:07,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:47:07,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:47:07,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:47:07,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:47:07,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2efd946a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07, skipping insertion in model container [2022-10-17 10:47:07,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,174 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:47:07,192 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:47:07,405 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2022-10-17 10:47:07,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:47:07,415 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:47:07,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2022-10-17 10:47:07,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:47:07,447 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:47:07,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07 WrapperNode [2022-10-17 10:47:07,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:47:07,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:47:07,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:47:07,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:47:07,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,483 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-10-17 10:47:07,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:47:07,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:47:07,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:47:07,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:47:07,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,506 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:47:07,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:47:07,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:47:07,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:47:07,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (1/1) ... [2022-10-17 10:47:07,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:47:07,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:07,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:47:07,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:47:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:47:07,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:47:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:47:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-10-17 10:47:07,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-10-17 10:47:07,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:47:07,680 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:47:07,682 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:47:07,864 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:47:07,871 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:47:07,871 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 10:47:07,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:47:07 BoogieIcfgContainer [2022-10-17 10:47:07,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:47:07,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:47:07,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:47:07,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:47:07,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:47:07" (1/3) ... [2022-10-17 10:47:07,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c345c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:47:07, skipping insertion in model container [2022-10-17 10:47:07,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:47:07" (2/3) ... [2022-10-17 10:47:07,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c345c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:47:07, skipping insertion in model container [2022-10-17 10:47:07,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:47:07" (3/3) ... [2022-10-17 10:47:07,882 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2022-10-17 10:47:07,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:47:07,903 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-10-17 10:47:07,966 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:47:07,974 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7f457bb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:47:07,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-10-17 10:47:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:47:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 10:47:07,986 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:07,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:07,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:07,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:07,994 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-10-17 10:47:08,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:08,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871796480] [2022-10-17 10:47:08,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:08,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:08,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871796480] [2022-10-17 10:47:08,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871796480] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:08,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:08,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:08,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352384779] [2022-10-17 10:47:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:08,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:08,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:08,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:08,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:47:08,406 INFO L87 Difference]: Start difference. First operand has 38 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2022-10-17 10:47:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:08,582 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-10-17 10:47:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:47:08,590 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 [2022-10-17 10:47:08,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:08,605 INFO L225 Difference]: With dead ends: 73 [2022-10-17 10:47:08,606 INFO L226 Difference]: Without dead ends: 59 [2022-10-17 10:47:08,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:47:08,613 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 55 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:08,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 119 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-17 10:47:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-10-17 10:47:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 42 states have internal predecessors, (52), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 10:47:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-10-17 10:47:08,687 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-10-17 10:47:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:08,688 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-10-17 10:47:08,688 INFO L496 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) [2022-10-17 10:47:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-10-17 10:47:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:47:08,689 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:08,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:08,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:47:08,690 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-10-17 10:47:08,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:08,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120720643] [2022-10-17 10:47:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:08,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:08,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:08,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120720643] [2022-10-17 10:47:08,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120720643] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:08,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:08,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022007816] [2022-10-17 10:47:08,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:08,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:47:08,840 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:08,984 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-10-17 10:47:08,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:47:08,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:47:08,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:08,986 INFO L225 Difference]: With dead ends: 51 [2022-10-17 10:47:08,986 INFO L226 Difference]: Without dead ends: 49 [2022-10-17 10:47:08,987 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:47:08,989 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:08,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 45 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:08,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-10-17 10:47:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-10-17 10:47:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.411764705882353) internal successors, (48), 40 states have internal predecessors, (48), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-10-17 10:47:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-10-17 10:47:09,022 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-10-17 10:47:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:09,023 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-10-17 10:47:09,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-10-17 10:47:09,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:47:09,024 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:09,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:09,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:47:09,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:09,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-10-17 10:47:09,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:09,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121959083] [2022-10-17 10:47:09,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:09,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:09,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:09,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121959083] [2022-10-17 10:47:09,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121959083] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:09,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:09,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:09,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349003503] [2022-10-17 10:47:09,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:09,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:09,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:09,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:47:09,215 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:09,329 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-10-17 10:47:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:47:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 10:47:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:09,332 INFO L225 Difference]: With dead ends: 76 [2022-10-17 10:47:09,332 INFO L226 Difference]: Without dead ends: 75 [2022-10-17 10:47:09,333 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:47:09,334 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:09,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 87 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:09,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-10-17 10:47:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-10-17 10:47:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3877551020408163) internal successors, (68), 55 states have internal predecessors, (68), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:47:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-10-17 10:47:09,358 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-10-17 10:47:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:09,358 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-10-17 10:47:09,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-10-17 10:47:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:47:09,360 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:09,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:09,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:47:09,361 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-10-17 10:47:09,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:09,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232506783] [2022-10-17 10:47:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:09,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:09,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:09,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232506783] [2022-10-17 10:47:09,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232506783] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:09,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:09,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243733127] [2022-10-17 10:47:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:09,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:09,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:47:09,430 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:09,544 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-10-17 10:47:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:47:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 10:47:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:09,547 INFO L225 Difference]: With dead ends: 116 [2022-10-17 10:47:09,547 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 10:47:09,548 INFO L412 NwaCegarLoop]: 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 [2022-10-17 10:47:09,550 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:09,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:09,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 10:47:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-10-17 10:47:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.337837837837838) internal successors, (99), 81 states have internal predecessors, (99), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:47:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-10-17 10:47:09,576 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-10-17 10:47:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:09,577 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-10-17 10:47:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-10-17 10:47:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:47:09,578 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:09,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:09,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:47:09,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-10-17 10:47:09,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:09,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970807290] [2022-10-17 10:47:09,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:09,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:09,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:09,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970807290] [2022-10-17 10:47:09,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970807290] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:09,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:09,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:09,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355285529] [2022-10-17 10:47:09,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:09,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:09,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:09,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:09,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:47:09,705 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-10-17 10:47:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:09,808 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-10-17 10:47:09,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:47:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2022-10-17 10:47:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:09,816 INFO L225 Difference]: With dead ends: 109 [2022-10-17 10:47:09,817 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 10:47:09,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:47:09,828 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:09,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 92 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 10:47:09,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-10-17 10:47:09,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 81 states have internal predecessors, (97), 16 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:47:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-10-17 10:47:09,856 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-10-17 10:47:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:09,856 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-10-17 10:47:09,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-10-17 10:47:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-10-17 10:47:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:47:09,857 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:09,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:09,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:47:09,859 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:09,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:09,859 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-10-17 10:47:09,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:09,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053862981] [2022-10-17 10:47:09,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:09,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:09,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:09,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053862981] [2022-10-17 10:47:09,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053862981] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:09,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:47:09,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:47:09,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347551421] [2022-10-17 10:47:09,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:09,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:47:09,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:47:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:47:09,906 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:09,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:09,975 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-10-17 10:47:09,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:47:09,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 10:47:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:09,977 INFO L225 Difference]: With dead ends: 168 [2022-10-17 10:47:09,977 INFO L226 Difference]: Without dead ends: 97 [2022-10-17 10:47:09,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:47:09,980 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 26 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:09,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:47:09,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-17 10:47:10,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-10-17 10:47:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 71 states have (on average 1.295774647887324) internal successors, (92), 78 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-10-17 10:47:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-10-17 10:47:10,010 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-10-17 10:47:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:10,010 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-10-17 10:47:10,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:10,010 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-10-17 10:47:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 10:47:10,011 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:10,011 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:10,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:47:10,012 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-10-17 10:47:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093945096] [2022-10-17 10:47:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:10,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093945096] [2022-10-17 10:47:10,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093945096] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:10,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176010341] [2022-10-17 10:47:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:10,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:10,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:10,148 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:10,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:47:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:10,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:47:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:10,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:10,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:10,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176010341] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:10,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:10,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-17 10:47:10,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623927952] [2022-10-17 10:47:10,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:10,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:47:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:10,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:47:10,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:47:10,457 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 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) [2022-10-17 10:47:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:10,787 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-10-17 10:47:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:47:10,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 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 16 [2022-10-17 10:47:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:10,797 INFO L225 Difference]: With dead ends: 274 [2022-10-17 10:47:10,797 INFO L226 Difference]: Without dead ends: 272 [2022-10-17 10:47:10,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:10,803 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 267 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:10,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 165 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:47:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-10-17 10:47:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-10-17 10:47:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 182 states have (on average 1.2637362637362637) internal successors, (230), 189 states have internal predecessors, (230), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-10-17 10:47:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-10-17 10:47:10,883 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-10-17 10:47:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:10,884 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-10-17 10:47:10,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 8 states have internal predecessors, (26), 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) [2022-10-17 10:47:10,884 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-10-17 10:47:10,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 10:47:10,886 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:10,886 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:10,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-17 10:47:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:47:11,100 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-10-17 10:47:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522511668] [2022-10-17 10:47:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:11,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:11,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522511668] [2022-10-17 10:47:11,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522511668] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:11,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227633848] [2022-10-17 10:47:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:11,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:11,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:11,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:47:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:47:11,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:11,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:11,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227633848] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:11,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:11,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-10-17 10:47:11,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350351646] [2022-10-17 10:47:11,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:11,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:47:11,333 INFO L87 Difference]: Start difference. First operand 236 states and 299 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:11,454 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-10-17 10:47:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:47:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 10:47:11,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:11,460 INFO L225 Difference]: With dead ends: 328 [2022-10-17 10:47:11,460 INFO L226 Difference]: Without dead ends: 327 [2022-10-17 10:47:11,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:47:11,462 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:11,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 100 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:11,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-10-17 10:47:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-10-17 10:47:11,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 227 states have (on average 1.2599118942731278) internal successors, (286), 234 states have internal predecessors, (286), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-10-17 10:47:11,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-10-17 10:47:11,510 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-10-17 10:47:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:11,511 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-10-17 10:47:11,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:11,511 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-10-17 10:47:11,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 10:47:11,512 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:11,513 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:11,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:11,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:47:11,735 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:11,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:11,736 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-10-17 10:47:11,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:11,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109932419] [2022-10-17 10:47:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:11,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:11,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109932419] [2022-10-17 10:47:11,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109932419] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605570397] [2022-10-17 10:47:11,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:11,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:11,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:11,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:11,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:47:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:47:11,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:11,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:12,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605570397] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:12,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:12,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-17 10:47:12,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387930902] [2022-10-17 10:47:12,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:12,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:47:12,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:12,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:47:12,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:47:12,048 INFO L87 Difference]: Start difference. First operand 293 states and 373 transitions. Second operand has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-10-17 10:47:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:12,337 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-10-17 10:47:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:47:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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 20 [2022-10-17 10:47:12,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:12,347 INFO L225 Difference]: With dead ends: 591 [2022-10-17 10:47:12,347 INFO L226 Difference]: Without dead ends: 590 [2022-10-17 10:47:12,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:12,351 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:12,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 232 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:47:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-10-17 10:47:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-10-17 10:47:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 407 states have (on average 1.203931203931204) internal successors, (490), 414 states have internal predecessors, (490), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-10-17 10:47:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-10-17 10:47:12,444 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-10-17 10:47:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:12,445 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-10-17 10:47:12,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 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) [2022-10-17 10:47:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-10-17 10:47:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:47:12,451 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:12,451 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:12,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:12,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:12,676 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:12,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:12,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-10-17 10:47:12,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:12,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109073057] [2022-10-17 10:47:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:47:12,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109073057] [2022-10-17 10:47:12,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109073057] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:12,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583838532] [2022-10-17 10:47:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:12,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:12,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:12,855 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:12,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:47:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:12,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:47:12,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:47:12,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:13,187 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:47:13,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583838532] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:13,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:13,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-10-17 10:47:13,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807121426] [2022-10-17 10:47:13,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:13,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:47:13,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:47:13,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:47:13,190 INFO L87 Difference]: Start difference. First operand 521 states and 649 transitions. Second operand has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:47:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:13,647 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2022-10-17 10:47:13,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:47:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-10-17 10:47:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:13,660 INFO L225 Difference]: With dead ends: 870 [2022-10-17 10:47:13,660 INFO L226 Difference]: Without dead ends: 868 [2022-10-17 10:47:13,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:47:13,663 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 178 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:13,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 135 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:47:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-10-17 10:47:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2022-10-17 10:47:13,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 542 states have (on average 1.2011070110701108) internal successors, (651), 572 states have internal predecessors, (651), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2022-10-17 10:47:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2022-10-17 10:47:13,777 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2022-10-17 10:47:13,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:13,779 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2022-10-17 10:47:13,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.25) internal successors, (39), 13 states have internal predecessors, (39), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:47:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2022-10-17 10:47:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:47:13,784 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:13,784 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:13,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:13,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:13,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:13,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:13,986 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-10-17 10:47:13,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:13,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797424980] [2022-10-17 10:47:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:47:14,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:14,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797424980] [2022-10-17 10:47:14,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797424980] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:14,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262770780] [2022-10-17 10:47:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:14,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:14,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:14,094 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:14,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:47:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:47:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 10:47:14,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:47:14,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262770780] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:47:14,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:47:14,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-10-17 10:47:14,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496443070] [2022-10-17 10:47:14,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:14,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:47:14,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:14,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:47:14,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:47:14,175 INFO L87 Difference]: Start difference. First operand 728 states and 989 transitions. Second operand has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-10-17 10:47:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:14,334 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2022-10-17 10:47:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:47:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 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 25 [2022-10-17 10:47:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:14,342 INFO L225 Difference]: With dead ends: 737 [2022-10-17 10:47:14,342 INFO L226 Difference]: Without dead ends: 736 [2022-10-17 10:47:14,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:47:14,344 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:14,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 102 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:14,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-10-17 10:47:14,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2022-10-17 10:47:14,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 542 states have (on average 1.1863468634686347) internal successors, (643), 571 states have internal predecessors, (643), 123 states have call successors, (123), 35 states have call predecessors, (123), 57 states have return successors, (215), 120 states have call predecessors, (215), 119 states have call successors, (215) [2022-10-17 10:47:14,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-10-17 10:47:14,433 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-10-17 10:47:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:14,433 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-10-17 10:47:14,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-10-17 10:47:14,433 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-10-17 10:47:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:47:14,434 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:14,435 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:14,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:14,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-10-17 10:47:14,663 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:14,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:14,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-10-17 10:47:14,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:14,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4410149] [2022-10-17 10:47:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:14,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-17 10:47:14,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4410149] [2022-10-17 10:47:14,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4410149] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658523379] [2022-10-17 10:47:14,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:14,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:14,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:14,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:47:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:14,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:47:14,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:47:14,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:47:15,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658523379] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:15,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:47:15,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-10-17 10:47:15,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986071044] [2022-10-17 10:47:15,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:15,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:47:15,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:15,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:47:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:47:15,064 INFO L87 Difference]: Start difference. First operand 727 states and 981 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2022-10-17 10:47:15,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:15,331 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-10-17 10:47:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:47:15,332 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 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 28 [2022-10-17 10:47:15,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:15,339 INFO L225 Difference]: With dead ends: 886 [2022-10-17 10:47:15,340 INFO L226 Difference]: Without dead ends: 885 [2022-10-17 10:47:15,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:15,341 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 52 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:15,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 109 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-10-17 10:47:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-10-17 10:47:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 602 states have (on average 1.1843853820598007) internal successors, (713), 633 states have internal predecessors, (713), 143 states have call successors, (143), 38 states have call predecessors, (143), 62 states have return successors, (220), 140 states have call predecessors, (220), 139 states have call successors, (220) [2022-10-17 10:47:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-10-17 10:47:15,441 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2022-10-17 10:47:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:15,442 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-10-17 10:47:15,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 3 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) [2022-10-17 10:47:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-10-17 10:47:15,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 10:47:15,446 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:15,446 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:15,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:15,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:47:15,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:15,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-10-17 10:47:15,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:15,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205836462] [2022-10-17 10:47:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:15,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 10:47:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:15,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:15,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:15,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205836462] [2022-10-17 10:47:15,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205836462] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:15,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882055469] [2022-10-17 10:47:15,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:15,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:15,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:15,847 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:15,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:47:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:15,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:47:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:15,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:15,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:16,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882055469] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:16,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:16,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-10-17 10:47:16,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111295803] [2022-10-17 10:47:16,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:16,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-17 10:47:16,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-17 10:47:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:47:16,162 INFO L87 Difference]: Start difference. First operand 812 states and 1076 transitions. Second operand has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 10:47:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:16,815 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-10-17 10:47:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:47:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-10-17 10:47:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:16,833 INFO L225 Difference]: With dead ends: 1503 [2022-10-17 10:47:16,833 INFO L226 Difference]: Without dead ends: 1501 [2022-10-17 10:47:16,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-10-17 10:47:16,836 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 130 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:16,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 172 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:47:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-10-17 10:47:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-10-17 10:47:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 902 states have (on average 1.1696230598669624) internal successors, (1055), 947 states have internal predecessors, (1055), 241 states have call successors, (241), 53 states have call predecessors, (241), 110 states have return successors, (548), 257 states have call predecessors, (548), 236 states have call successors, (548) [2022-10-17 10:47:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-10-17 10:47:17,023 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2022-10-17 10:47:17,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:17,023 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-10-17 10:47:17,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.411764705882353) internal successors, (41), 14 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 10:47:17,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-10-17 10:47:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:47:17,026 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:17,026 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:17,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:17,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:47:17,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-10-17 10:47:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:17,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704936012] [2022-10-17 10:47:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:17,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:17,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:47:17,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:17,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704936012] [2022-10-17 10:47:17,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704936012] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:17,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781462540] [2022-10-17 10:47:17,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:47:17,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:17,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:17,439 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:17,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:47:17,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:47:17,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:47:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:47:17,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:47:17,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:47:17,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781462540] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:17,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:17,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-10-17 10:47:17,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758508805] [2022-10-17 10:47:17,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:17,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-10-17 10:47:17,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:17,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-10-17 10:47:17,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:47:17,745 INFO L87 Difference]: Start difference. First operand 1258 states and 1844 transitions. Second operand has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:47:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:18,548 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2022-10-17 10:47:18,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-10-17 10:47:18,549 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-10-17 10:47:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:18,578 INFO L225 Difference]: With dead ends: 2355 [2022-10-17 10:47:18,578 INFO L226 Difference]: Without dead ends: 2338 [2022-10-17 10:47:18,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2022-10-17 10:47:18,585 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 235 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:18,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 161 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:47:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-10-17 10:47:18,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2022-10-17 10:47:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1280 states have (on average 1.16484375) internal successors, (1491), 1338 states have internal predecessors, (1491), 308 states have call successors, (308), 82 states have call predecessors, (308), 160 states have return successors, (829), 332 states have call predecessors, (829), 300 states have call successors, (829) [2022-10-17 10:47:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2022-10-17 10:47:18,861 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2022-10-17 10:47:18,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:18,876 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2022-10-17 10:47:18,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 6 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:47:18,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2022-10-17 10:47:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:47:18,878 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:18,878 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:18,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-10-17 10:47:19,103 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:19,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:19,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-10-17 10:47:19,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032975167] [2022-10-17 10:47:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:19,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:19,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 10:47:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:19,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:19,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032975167] [2022-10-17 10:47:19,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032975167] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:19,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903851821] [2022-10-17 10:47:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:19,262 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:19,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:47:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:47:19,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:19,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:19,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903851821] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:19,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:47:19,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-10-17 10:47:19,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515185118] [2022-10-17 10:47:19,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:47:19,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:47:19,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:19,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:47:19,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:47:19,597 INFO L87 Difference]: Start difference. First operand 1753 states and 2628 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:47:20,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:20,073 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2022-10-17 10:47:20,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 10:47:20,074 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-10-17 10:47:20,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:20,094 INFO L225 Difference]: With dead ends: 1910 [2022-10-17 10:47:20,094 INFO L226 Difference]: Without dead ends: 1909 [2022-10-17 10:47:20,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-10-17 10:47:20,097 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:20,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 168 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:47:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-10-17 10:47:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2022-10-17 10:47:20,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1271 states have (on average 1.163650668764752) internal successors, (1479), 1329 states have internal predecessors, (1479), 305 states have call successors, (305), 82 states have call predecessors, (305), 153 states have return successors, (696), 322 states have call predecessors, (696), 297 states have call successors, (696) [2022-10-17 10:47:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2022-10-17 10:47:20,344 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2022-10-17 10:47:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:20,345 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2022-10-17 10:47:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:47:20,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2022-10-17 10:47:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 10:47:20,348 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:20,348 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:20,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-10-17 10:47:20,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-10-17 10:47:20,570 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:20,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:20,570 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2022-10-17 10:47:20,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:20,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171419486] [2022-10-17 10:47:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:20,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:20,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:20,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:47:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:20,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-10-17 10:47:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-10-17 10:47:20,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:20,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171419486] [2022-10-17 10:47:20,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171419486] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:20,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24914779] [2022-10-17 10:47:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:20,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:20,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:20,655 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:20,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-10-17 10:47:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:20,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:47:20,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:47:20,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-10-17 10:47:20,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24914779] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:20,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:20,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-10-17 10:47:20,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097643734] [2022-10-17 10:47:20,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:20,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 10:47:20,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 10:47:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:47:20,939 INFO L87 Difference]: Start difference. First operand 1734 states and 2480 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 10:47:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:21,191 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2022-10-17 10:47:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:47:21,192 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2022-10-17 10:47:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:21,200 INFO L225 Difference]: With dead ends: 2467 [2022-10-17 10:47:21,200 INFO L226 Difference]: Without dead ends: 869 [2022-10-17 10:47:21,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:47:21,214 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 95 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:21,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 103 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:47:21,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-10-17 10:47:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2022-10-17 10:47:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 633 states have (on average 1.1342812006319116) internal successors, (718), 653 states have internal predecessors, (718), 153 states have call successors, (153), 46 states have call predecessors, (153), 60 states have return successors, (244), 150 states have call predecessors, (244), 149 states have call successors, (244) [2022-10-17 10:47:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2022-10-17 10:47:21,313 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2022-10-17 10:47:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:21,313 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2022-10-17 10:47:21,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 10:47:21,314 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2022-10-17 10:47:21,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-17 10:47:21,316 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:21,316 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:21,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:21,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:21,543 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:21,544 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-10-17 10:47:21,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:21,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594785702] [2022-10-17 10:47:21,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:21,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:21,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594785702] [2022-10-17 10:47:21,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594785702] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:21,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128358072] [2022-10-17 10:47:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:47:21,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:21,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:21,735 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:21,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-10-17 10:47:21,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:47:21,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:47:21,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:47:21,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:21,904 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:21,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:47:22,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128358072] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:22,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:22,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-10-17 10:47:22,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600159327] [2022-10-17 10:47:22,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:22,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:47:22,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:22,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:47:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:47:22,114 INFO L87 Difference]: Start difference. First operand 850 states and 1115 transitions. Second operand has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 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) [2022-10-17 10:47:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:22,838 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2022-10-17 10:47:22,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-17 10:47:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 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 44 [2022-10-17 10:47:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:22,851 INFO L225 Difference]: With dead ends: 1623 [2022-10-17 10:47:22,851 INFO L226 Difference]: Without dead ends: 1622 [2022-10-17 10:47:22,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-10-17 10:47:22,854 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 448 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:22,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 383 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:47:22,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-10-17 10:47:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2022-10-17 10:47:23,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1125 states have (on average 1.1075555555555556) internal successors, (1246), 1157 states have internal predecessors, (1246), 273 states have call successors, (273), 82 states have call predecessors, (273), 108 states have return successors, (436), 270 states have call predecessors, (436), 269 states have call successors, (436) [2022-10-17 10:47:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2022-10-17 10:47:23,031 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2022-10-17 10:47:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:23,032 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2022-10-17 10:47:23,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 14 states have internal predecessors, (75), 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) [2022-10-17 10:47:23,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2022-10-17 10:47:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:47:23,034 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:23,034 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:23,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:23,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:23,248 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:23,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:23,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-10-17 10:47:23,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:23,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566192991] [2022-10-17 10:47:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:23,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:23,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:23,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 10:47:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:23,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:23,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566192991] [2022-10-17 10:47:23,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566192991] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:23,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106800652] [2022-10-17 10:47:23,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:47:23,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:23,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:23,451 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:23,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-10-17 10:47:23,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:47:23,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:47:23,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:47:23,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:23,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 10:47:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106800652] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:23,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:23,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-10-17 10:47:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171621764] [2022-10-17 10:47:23,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:23,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-10-17 10:47:23,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-10-17 10:47:23,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:47:23,846 INFO L87 Difference]: Start difference. First operand 1510 states and 1955 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 10:47:25,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:25,316 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2022-10-17 10:47:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-10-17 10:47:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2022-10-17 10:47:25,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:25,339 INFO L225 Difference]: With dead ends: 3056 [2022-10-17 10:47:25,339 INFO L226 Difference]: Without dead ends: 2163 [2022-10-17 10:47:25,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=504, Invalid=1752, Unknown=0, NotChecked=0, Total=2256 [2022-10-17 10:47:25,354 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 238 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:25,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 258 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:47:25,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-10-17 10:47:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2022-10-17 10:47:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1208 states have (on average 1.1018211920529801) internal successors, (1331), 1240 states have internal predecessors, (1331), 292 states have call successors, (292), 91 states have call predecessors, (292), 117 states have return successors, (461), 289 states have call predecessors, (461), 288 states have call successors, (461) [2022-10-17 10:47:25,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2022-10-17 10:47:25,622 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2022-10-17 10:47:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:25,623 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2022-10-17 10:47:25,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 16 states have internal predecessors, (63), 5 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-10-17 10:47:25,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2022-10-17 10:47:25,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-10-17 10:47:25,625 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:25,625 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:25,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:25,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-10-17 10:47:25,846 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:25,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-10-17 10:47:25,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:25,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345532113] [2022-10-17 10:47:25,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:25,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:25,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:47:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:26,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 10:47:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:26,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:47:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:47:26,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345532113] [2022-10-17 10:47:26,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345532113] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:26,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007195085] [2022-10-17 10:47:26,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:26,159 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:26,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-10-17 10:47:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:26,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:47:26,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 10:47:26,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:26,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:47:26,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007195085] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:26,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:26,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-10-17 10:47:26,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714400493] [2022-10-17 10:47:26,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:26,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 10:47:26,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 10:47:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:47:26,822 INFO L87 Difference]: Start difference. First operand 1621 states and 2084 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:47:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:29,018 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2022-10-17 10:47:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-10-17 10:47:29,024 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 52 [2022-10-17 10:47:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:29,086 INFO L225 Difference]: With dead ends: 4064 [2022-10-17 10:47:29,086 INFO L226 Difference]: Without dead ends: 4060 [2022-10-17 10:47:29,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-10-17 10:47:29,095 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 430 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:29,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 244 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [430 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:47:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-10-17 10:47:29,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2022-10-17 10:47:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2916 states, 2015 states have (on average 1.078908188585608) internal successors, (2174), 2047 states have internal predecessors, (2174), 557 states have call successors, (557), 105 states have call predecessors, (557), 340 states have return successors, (3218), 763 states have call predecessors, (3218), 551 states have call successors, (3218) [2022-10-17 10:47:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2022-10-17 10:47:29,645 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2022-10-17 10:47:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:29,646 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2022-10-17 10:47:29,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 21 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 10:47:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2022-10-17 10:47:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-10-17 10:47:29,650 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:29,650 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:29,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:29,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:29,864 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:29,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:29,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-10-17 10:47:29,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:29,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447763697] [2022-10-17 10:47:29,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:29,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:47:30,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447763697] [2022-10-17 10:47:30,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447763697] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:30,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729326209] [2022-10-17 10:47:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:30,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:30,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:30,107 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:30,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-10-17 10:47:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:30,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 10:47:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:47:30,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:30,567 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:47:30,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729326209] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:30,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:30,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-10-17 10:47:30,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735287806] [2022-10-17 10:47:30,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:30,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 10:47:30,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:30,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 10:47:30,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:47:30,570 INFO L87 Difference]: Start difference. First operand 2916 states and 5949 transitions. Second operand has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:47:32,229 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2022-10-17 10:47:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-10-17 10:47:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-10-17 10:47:32,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:47:32,322 INFO L225 Difference]: With dead ends: 7961 [2022-10-17 10:47:32,323 INFO L226 Difference]: Without dead ends: 7960 [2022-10-17 10:47:32,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-10-17 10:47:32,329 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 556 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:47:32,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 349 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:47:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2022-10-17 10:47:33,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2022-10-17 10:47:33,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7884 states, 5489 states have (on average 1.0814355984696666) internal successors, (5936), 5593 states have internal predecessors, (5936), 1505 states have call successors, (1505), 303 states have call predecessors, (1505), 886 states have return successors, (8678), 1987 states have call predecessors, (8678), 1499 states have call successors, (8678) [2022-10-17 10:47:33,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2022-10-17 10:47:33,679 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2022-10-17 10:47:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:47:33,679 INFO L495 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2022-10-17 10:47:33,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.739130434782609) internal successors, (86), 14 states have internal predecessors, (86), 10 states have call successors, (16), 10 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:47:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2022-10-17 10:47:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-10-17 10:47:33,682 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:47:33,683 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:47:33,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-10-17 10:47:33,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-10-17 10:47:33,899 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-10-17 10:47:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:47:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-10-17 10:47:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:47:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622745600] [2022-10-17 10:47:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:33,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:47:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-10-17 10:47:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:34,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-10-17 10:47:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:34,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-10-17 10:47:34,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:34,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-17 10:47:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:47:34,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:47:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622745600] [2022-10-17 10:47:34,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622745600] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:47:34,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261004340] [2022-10-17 10:47:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:47:34,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:47:34,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:47:34,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:47:34,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_785c3804-f766-46ff-83a5-4ce1dc0b330d/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-10-17 10:47:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:47:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:47:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:47:34,278 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-10-17 10:47:34,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:47:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-17 10:47:34,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261004340] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:47:34,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:47:34,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-10-17 10:47:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420065598] [2022-10-17 10:47:34,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:47:34,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-10-17 10:47:34,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:47:34,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-10-17 10:47:34,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:47:34,904 INFO L87 Difference]: Start difference. First operand 7884 states and 16119 transitions. Second operand has 27 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 21 states have internal predecessors, (64), 5 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9)