./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN --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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- 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-6b4ec56 [2022-11-20 11:32:34,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 11:32:34,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 11:32:34,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 11:32:34,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 11:32:34,750 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 11:32:34,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 11:32:34,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 11:32:34,756 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 11:32:34,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 11:32:34,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 11:32:34,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 11:32:34,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 11:32:34,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 11:32:34,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 11:32:34,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 11:32:34,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 11:32:34,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 11:32:34,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 11:32:34,772 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 11:32:34,777 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 11:32:34,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 11:32:34,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 11:32:34,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 11:32:34,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 11:32:34,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 11:32:34,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 11:32:34,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 11:32:34,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 11:32:34,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 11:32:34,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 11:32:34,792 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 11:32:34,793 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 11:32:34,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 11:32:34,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 11:32:34,796 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 11:32:34,797 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 11:32:34,797 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 11:32:34,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 11:32:34,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 11:32:34,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 11:32:34,801 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-20 11:32:34,827 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 11:32:34,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 11:32:34,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 11:32:34,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 11:32:34,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 11:32:34,830 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 11:32:34,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 11:32:34,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 11:32:34,832 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 11:32:34,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 11:32:34,832 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 11:32:34,833 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 11:32:34,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 11:32:34,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 11:32:34,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 11:32:34,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 11:32:34,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 11:32:34,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 11:32:34,835 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-20 11:32:34,835 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 11:32:34,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 11:32:34,836 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 11:32:34,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 11:32:34,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 11:32:34,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 11:32:34,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 11:32:34,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:32:34,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 11:32:34,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 11:32:34,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 11:32:34,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 11:32:34,839 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 11:32:34,839 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 11:32:34,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 11:32:34,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 11:32:34,840 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_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2022-11-20 11:32:35,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 11:32:35,189 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 11:32:35,192 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 11:32:35,194 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 11:32:35,194 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 11:32:35,196 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/recursive/Ackermann04.c [2022-11-20 11:32:38,347 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 11:32:38,556 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 11:32:38,557 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/sv-benchmarks/c/recursive/Ackermann04.c [2022-11-20 11:32:38,566 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/data/1371c11dc/58fb679a100b45d2a20a7c75a9f4af61/FLAG6532a7ed9 [2022-11-20 11:32:38,582 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/data/1371c11dc/58fb679a100b45d2a20a7c75a9f4af61 [2022-11-20 11:32:38,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 11:32:38,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 11:32:38,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 11:32:38,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 11:32:38,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 11:32:38,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b11322b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38, skipping insertion in model container [2022-11-20 11:32:38,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 11:32:38,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 11:32:38,767 WARN L237 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_07afbf37-0d2c-49ae-ae47-588fe26b7384/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2022-11-20 11:32:38,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:32:38,780 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 11:32:38,797 WARN L237 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_07afbf37-0d2c-49ae-ae47-588fe26b7384/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2022-11-20 11:32:38,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 11:32:38,812 INFO L208 MainTranslator]: Completed translation [2022-11-20 11:32:38,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38 WrapperNode [2022-11-20 11:32:38,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 11:32:38,813 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 11:32:38,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 11:32:38,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 11:32:38,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,839 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-20 11:32:38,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 11:32:38,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 11:32:38,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 11:32:38,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 11:32:38,848 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,856 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,859 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 11:32:38,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 11:32:38,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 11:32:38,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 11:32:38,861 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (1/1) ... [2022-11-20 11:32:38,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 11:32:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:38,903 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 11:32:38,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 11:32:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 11:32:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 11:32:38,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 11:32:38,946 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-11-20 11:32:38,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-11-20 11:32:38,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 11:32:39,011 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 11:32:39,013 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 11:32:39,189 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 11:32:39,196 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 11:32:39,197 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-20 11:32:39,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:39 BoogieIcfgContainer [2022-11-20 11:32:39,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 11:32:39,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 11:32:39,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 11:32:39,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 11:32:39,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:32:38" (1/3) ... [2022-11-20 11:32:39,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae8b70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:39, skipping insertion in model container [2022-11-20 11:32:39,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:32:38" (2/3) ... [2022-11-20 11:32:39,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ae8b70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:32:39, skipping insertion in model container [2022-11-20 11:32:39,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:32:39" (3/3) ... [2022-11-20 11:32:39,213 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2022-11-20 11:32:39,237 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 11:32:39,237 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-20 11:32:39,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 11:32:39,307 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2da69773, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 11:32:39,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 11:32:39,311 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) [2022-11-20 11:32:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 11:32:39,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:39,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:39,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-11-20 11:32:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:39,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791488381] [2022-11-20 11:32:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:39,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:39,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:39,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791488381] [2022-11-20 11:32:39,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791488381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:39,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:32:39,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:32:39,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865027304] [2022-11-20 11:32:39,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:39,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:39,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:39,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:32:39,754 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) [2022-11-20 11:32:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:39,960 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-20 11:32:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:32:39,964 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 [2022-11-20 11:32:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:39,975 INFO L225 Difference]: With dead ends: 73 [2022-11-20 11:32:39,975 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 11:32:39,979 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 [2022-11-20 11:32:39,983 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 [2022-11-20 11:32:39,984 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] [2022-11-20 11:32:40,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 11:32:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-11-20 11:32:40,058 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) [2022-11-20 11:32:40,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-20 11:32:40,068 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-11-20 11:32:40,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:40,069 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-20 11:32:40,070 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) [2022-11-20 11:32:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-20 11:32:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:32:40,072 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:40,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 11:32:40,075 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:40,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-11-20 11:32:40,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:40,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124488881] [2022-11-20 11:32:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:40,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:40,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:40,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124488881] [2022-11-20 11:32:40,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124488881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:40,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:32:40,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:32:40,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538675368] [2022-11-20 11:32:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:40,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:40,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:40,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:40,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:32:40,198 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) [2022-11-20 11:32:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:40,285 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-11-20 11:32:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 11:32:40,286 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 [2022-11-20 11:32:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:40,288 INFO L225 Difference]: With dead ends: 51 [2022-11-20 11:32:40,288 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 11:32:40,288 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 [2022-11-20 11:32:40,290 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-20 11:32:40,291 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] [2022-11-20 11:32:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 11:32:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-20 11:32:40,301 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) [2022-11-20 11:32:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-20 11:32:40,304 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-11-20 11:32:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:40,304 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-20 11:32:40,305 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) [2022-11-20 11:32:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-20 11:32:40,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-20 11:32:40,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:40,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:40,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 11:32:40,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:40,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-11-20 11:32:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527116911] [2022-11-20 11:32:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:40,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:40,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:40,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527116911] [2022-11-20 11:32:40,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527116911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:40,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:32:40,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:32:40,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151436181] [2022-11-20 11:32:40,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:40,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:40,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:40,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:40,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:32:40,462 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) [2022-11-20 11:32:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:40,593 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-20 11:32:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:32:40,605 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 [2022-11-20 11:32:40,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:40,607 INFO L225 Difference]: With dead ends: 76 [2022-11-20 11:32:40,607 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 11:32:40,608 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 [2022-11-20 11:32:40,610 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 [2022-11-20 11:32:40,611 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] [2022-11-20 11:32:40,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 11:32:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-11-20 11:32:40,639 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) [2022-11-20 11:32:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-20 11:32:40,653 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-11-20 11:32:40,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:40,653 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-20 11:32:40,654 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) [2022-11-20 11:32:40,654 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-20 11:32:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 11:32:40,655 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:40,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 11:32:40,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-11-20 11:32:40,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:40,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007421235] [2022-11-20 11:32:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:40,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:40,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007421235] [2022-11-20 11:32:40,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007421235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:40,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:32:40,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:32:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441221597] [2022-11-20 11:32:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:40,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:32:40,787 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) [2022-11-20 11:32:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:40,959 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-11-20 11:32:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:32:40,960 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 [2022-11-20 11:32:40,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:40,962 INFO L225 Difference]: With dead ends: 116 [2022-11-20 11:32:40,963 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:32:40,963 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 [2022-11-20 11:32:40,965 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 [2022-11-20 11:32:40,966 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] [2022-11-20 11:32:40,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:32:40,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-20 11:32:40,990 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) [2022-11-20 11:32:40,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-11-20 11:32:40,993 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-11-20 11:32:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:40,994 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-11-20 11:32:40,994 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) [2022-11-20 11:32:40,994 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-11-20 11:32:40,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 11:32:40,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:40,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 11:32:40,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:40,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-11-20 11:32:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:40,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282016777] [2022-11-20 11:32:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:40,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:41,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282016777] [2022-11-20 11:32:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282016777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:41,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:32:41,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:32:41,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644628240] [2022-11-20 11:32:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:41,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:41,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:41,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 11:32:41,076 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) [2022-11-20 11:32:41,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:41,180 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-11-20 11:32:41,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:32:41,181 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 [2022-11-20 11:32:41,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:41,183 INFO L225 Difference]: With dead ends: 109 [2022-11-20 11:32:41,183 INFO L226 Difference]: Without dead ends: 108 [2022-11-20 11:32:41,184 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 [2022-11-20 11:32:41,185 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 11:32:41,186 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] [2022-11-20 11:32:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-20 11:32:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-20 11:32:41,222 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) [2022-11-20 11:32:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-11-20 11:32:41,231 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-11-20 11:32:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:41,231 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-11-20 11:32:41,231 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) [2022-11-20 11:32:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-11-20 11:32:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:32:41,232 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:41,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:41,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 11:32:41,233 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:41,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-11-20 11:32:41,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:41,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098998288] [2022-11-20 11:32:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:41,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:41,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:41,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098998288] [2022-11-20 11:32:41,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098998288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:41,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 11:32:41,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 11:32:41,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937381100] [2022-11-20 11:32:41,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:41,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 11:32:41,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:41,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 11:32:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 11:32:41,314 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) [2022-11-20 11:32:41,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:41,398 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-11-20 11:32:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 11:32:41,399 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 [2022-11-20 11:32:41,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:41,402 INFO L225 Difference]: With dead ends: 168 [2022-11-20 11:32:41,402 INFO L226 Difference]: Without dead ends: 97 [2022-11-20 11:32:41,404 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 [2022-11-20 11:32:41,405 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 [2022-11-20 11:32:41,406 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] [2022-11-20 11:32:41,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-20 11:32:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-11-20 11:32:41,421 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) [2022-11-20 11:32:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-11-20 11:32:41,423 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-11-20 11:32:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:41,423 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-11-20 11:32:41,423 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) [2022-11-20 11:32:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-11-20 11:32:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 11:32:41,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:41,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:41,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 11:32:41,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:41,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:41,426 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-11-20 11:32:41,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:41,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919773360] [2022-11-20 11:32:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:41,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:41,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:41,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919773360] [2022-11-20 11:32:41,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919773360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:41,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924874956] [2022-11-20 11:32:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:41,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:41,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:41,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:41,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 11:32:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:32:41,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:41,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:41,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:41,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924874956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:41,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:41,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-20 11:32:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530812167] [2022-11-20 11:32:41,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:41,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:32:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:32:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:32:41,788 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) [2022-11-20 11:32:42,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:42,167 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-11-20 11:32:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:32:42,173 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 [2022-11-20 11:32:42,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:42,176 INFO L225 Difference]: With dead ends: 274 [2022-11-20 11:32:42,177 INFO L226 Difference]: Without dead ends: 272 [2022-11-20 11:32:42,177 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 [2022-11-20 11:32:42,179 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 [2022-11-20 11:32:42,187 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] [2022-11-20 11:32:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-20 11:32:42,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-11-20 11:32:42,255 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) [2022-11-20 11:32:42,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-11-20 11:32:42,258 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-11-20 11:32:42,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:42,259 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-11-20 11:32:42,259 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) [2022-11-20 11:32:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-11-20 11:32:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 11:32:42,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:42,260 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:42,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:42,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:42,464 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-11-20 11:32:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:42,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969643674] [2022-11-20 11:32:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:42,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:42,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:42,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969643674] [2022-11-20 11:32:42,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969643674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591421911] [2022-11-20 11:32:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:42,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:42,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:42,560 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:42,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 11:32:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:42,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:32:42,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:42,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:42,671 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:32:42,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591421911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:42,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:32:42,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-20 11:32:42,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132105408] [2022-11-20 11:32:42,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:42,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 11:32:42,678 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) [2022-11-20 11:32:42,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:42,824 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-11-20 11:32:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 11:32:42,826 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 [2022-11-20 11:32:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:42,834 INFO L225 Difference]: With dead ends: 328 [2022-11-20 11:32:42,834 INFO L226 Difference]: Without dead ends: 327 [2022-11-20 11:32:42,835 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 [2022-11-20 11:32:42,842 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 [2022-11-20 11:32:42,844 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] [2022-11-20 11:32:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-20 11:32:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-11-20 11:32:42,888 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) [2022-11-20 11:32:42,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-11-20 11:32:42,893 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-11-20 11:32:42,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:42,893 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-11-20 11:32:42,893 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) [2022-11-20 11:32:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-11-20 11:32:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 11:32:42,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:42,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:42,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 11:32:43,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 11:32:43,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:43,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:43,103 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-11-20 11:32:43,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:43,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822159295] [2022-11-20 11:32:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:43,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:43,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:43,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822159295] [2022-11-20 11:32:43,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822159295] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:43,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590207357] [2022-11-20 11:32:43,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:43,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:43,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:43,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:43,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 11:32:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:32:43,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:43,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:43,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:43,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590207357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:43,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:43,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-20 11:32:43,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118822883] [2022-11-20 11:32:43,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:43,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:32:43,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:43,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:32:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:32:43,354 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) [2022-11-20 11:32:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:43,692 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-11-20 11:32:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:32:43,692 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 [2022-11-20 11:32:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:43,700 INFO L225 Difference]: With dead ends: 591 [2022-11-20 11:32:43,700 INFO L226 Difference]: Without dead ends: 590 [2022-11-20 11:32:43,701 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 [2022-11-20 11:32:43,702 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 140 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-20 11:32:43,703 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] [2022-11-20 11:32:43,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-20 11:32:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-11-20 11:32:43,764 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) [2022-11-20 11:32:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-11-20 11:32:43,770 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-11-20 11:32:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:43,771 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-11-20 11:32:43,771 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) [2022-11-20 11:32:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-11-20 11:32:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:32:43,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:43,777 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] [2022-11-20 11:32:43,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:43,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:43,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-11-20 11:32:43,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:43,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924241337] [2022-11-20 11:32:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:44,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:32:44,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924241337] [2022-11-20 11:32:44,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924241337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:44,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478693587] [2022-11-20 11:32:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:44,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:44,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:44,172 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:44,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 11:32:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-20 11:32:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:44,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:32:44,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:32:44,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478693587] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:44,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:44,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-20 11:32:44,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809915638] [2022-11-20 11:32:44,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:44,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 11:32:44,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:44,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 11:32:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-20 11:32:44,530 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) [2022-11-20 11:32:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:44,960 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2022-11-20 11:32:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 11:32:44,961 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 [2022-11-20 11:32:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:44,967 INFO L225 Difference]: With dead ends: 870 [2022-11-20 11:32:44,967 INFO L226 Difference]: Without dead ends: 868 [2022-11-20 11:32:44,968 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 [2022-11-20 11:32:44,969 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 [2022-11-20 11:32:44,970 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] [2022-11-20 11:32:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-20 11:32:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2022-11-20 11:32:45,056 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) [2022-11-20 11:32:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2022-11-20 11:32:45,064 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2022-11-20 11:32:45,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:45,064 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2022-11-20 11:32:45,064 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) [2022-11-20 11:32:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2022-11-20 11:32:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-20 11:32:45,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:45,066 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] [2022-11-20 11:32:45,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:45,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 11:32:45,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:45,281 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-11-20 11:32:45,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:45,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505653683] [2022-11-20 11:32:45,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:45,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:45,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:32:45,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:45,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505653683] [2022-11-20 11:32:45,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505653683] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:45,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357924691] [2022-11-20 11:32:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:45,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:45,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:45,398 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:45,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 11:32:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:45,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 11:32:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 11:32:45,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 11:32:45,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357924691] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 11:32:45,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 11:32:45,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-20 11:32:45,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842053736] [2022-11-20 11:32:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:45,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 11:32:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 11:32:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-20 11:32:45,509 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) [2022-11-20 11:32:45,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:45,676 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2022-11-20 11:32:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 11:32:45,677 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 [2022-11-20 11:32:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:45,683 INFO L225 Difference]: With dead ends: 737 [2022-11-20 11:32:45,683 INFO L226 Difference]: Without dead ends: 736 [2022-11-20 11:32:45,684 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 [2022-11-20 11:32:45,685 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 41 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-11-20 11:32:45,686 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] [2022-11-20 11:32:45,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-20 11:32:45,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2022-11-20 11:32:45,759 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) [2022-11-20 11:32:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-11-20 11:32:45,766 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-11-20 11:32:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:45,766 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-11-20 11:32:45,767 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) [2022-11-20 11:32:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-11-20 11:32:45,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 11:32:45,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:45,768 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] [2022-11-20 11:32:45,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:45,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:45,974 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:45,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:45,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-11-20 11:32:45,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:45,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124109727] [2022-11-20 11:32:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:45,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:46,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 11:32:46,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:46,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124109727] [2022-11-20 11:32:46,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124109727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:46,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663092052] [2022-11-20 11:32:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:46,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:46,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:46,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 11:32:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:46,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-20 11:32:46,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:32:46,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 11:32:46,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663092052] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:46,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:32:46,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-20 11:32:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810866091] [2022-11-20 11:32:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:46,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 11:32:46,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 11:32:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:32:46,408 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) [2022-11-20 11:32:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:46,681 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-11-20 11:32:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:32:46,681 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 [2022-11-20 11:32:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:46,687 INFO L225 Difference]: With dead ends: 886 [2022-11-20 11:32:46,688 INFO L226 Difference]: Without dead ends: 885 [2022-11-20 11:32:46,689 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 [2022-11-20 11:32:46,690 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 [2022-11-20 11:32:46,690 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] [2022-11-20 11:32:46,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-20 11:32:46,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-11-20 11:32:46,766 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) [2022-11-20 11:32:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-11-20 11:32:46,774 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2022-11-20 11:32:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:46,774 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-11-20 11:32:46,774 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) [2022-11-20 11:32:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-11-20 11:32:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-20 11:32:46,778 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:46,779 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] [2022-11-20 11:32:46,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:46,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 11:32:46,985 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:46,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-11-20 11:32:46,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:46,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388011022] [2022-11-20 11:32:46,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:46,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:47,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:47,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:32:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:47,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:47,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388011022] [2022-11-20 11:32:47,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388011022] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:47,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914791338] [2022-11-20 11:32:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:47,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:47,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:47,164 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:47,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:32:47,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:47,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:32:47,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:47,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:47,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:47,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914791338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:47,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:47,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-20 11:32:47,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286556123] [2022-11-20 11:32:47,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:47,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 11:32:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 11:32:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:32:47,534 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) [2022-11-20 11:32:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:48,210 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-11-20 11:32:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-20 11:32:48,210 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 [2022-11-20 11:32:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:48,224 INFO L225 Difference]: With dead ends: 1503 [2022-11-20 11:32:48,225 INFO L226 Difference]: Without dead ends: 1501 [2022-11-20 11:32:48,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-11-20 11:32:48,228 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 135 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:48,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 172 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:32:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-20 11:32:48,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-11-20 11:32:48,418 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) [2022-11-20 11:32:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-11-20 11:32:48,432 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2022-11-20 11:32:48,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:48,432 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-11-20 11:32:48,432 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) [2022-11-20 11:32:48,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-11-20 11:32:48,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 11:32:48,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:48,435 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] [2022-11-20 11:32:48,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:48,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:48,641 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-11-20 11:32:48,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:48,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797618036] [2022-11-20 11:32:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:48,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:48,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:32:48,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:48,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797618036] [2022-11-20 11:32:48,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797618036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:48,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575007524] [2022-11-20 11:32:48,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:32:48,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:48,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:48,824 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:48,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:32:48,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:32:48,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:32:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:32:48,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-20 11:32:49,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575007524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:49,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:49,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-20 11:32:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538873320] [2022-11-20 11:32:49,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-20 11:32:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-20 11:32:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:32:49,162 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) [2022-11-20 11:32:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:49,961 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2022-11-20 11:32:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 11:32:49,961 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 [2022-11-20 11:32:49,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:49,980 INFO L225 Difference]: With dead ends: 2355 [2022-11-20 11:32:49,980 INFO L226 Difference]: Without dead ends: 2338 [2022-11-20 11:32:49,983 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 [2022-11-20 11:32:49,984 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 235 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-20 11:32:49,984 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] [2022-11-20 11:32:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-11-20 11:32:50,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2022-11-20 11:32:50,241 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) [2022-11-20 11:32:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2022-11-20 11:32:50,258 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2022-11-20 11:32:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:50,258 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2022-11-20 11:32:50,259 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) [2022-11-20 11:32:50,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2022-11-20 11:32:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 11:32:50,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:50,261 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] [2022-11-20 11:32:50,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:50,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:50,467 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:50,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-11-20 11:32:50,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:50,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75961591] [2022-11-20 11:32:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:50,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:50,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:50,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:50,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:32:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:50,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75961591] [2022-11-20 11:32:50,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75961591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405909417] [2022-11-20 11:32:50,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:50,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:50,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:50,610 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:50,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 11:32:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:50,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 11:32:50,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:50,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:50,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405909417] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:50,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 11:32:50,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-11-20 11:32:50,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841852847] [2022-11-20 11:32:50,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 11:32:50,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 11:32:50,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:50,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 11:32:50,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-20 11:32:50,962 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) [2022-11-20 11:32:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:51,451 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2022-11-20 11:32:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 11:32:51,452 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 [2022-11-20 11:32:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:51,466 INFO L225 Difference]: With dead ends: 1910 [2022-11-20 11:32:51,467 INFO L226 Difference]: Without dead ends: 1909 [2022-11-20 11:32:51,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-11-20 11:32:51,471 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:51,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 168 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 11:32:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-11-20 11:32:51,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2022-11-20 11:32:51,672 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) [2022-11-20 11:32:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2022-11-20 11:32:51,686 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2022-11-20 11:32:51,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:51,687 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2022-11-20 11:32:51,688 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) [2022-11-20 11:32:51,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2022-11-20 11:32:51,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 11:32:51,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:51,690 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] [2022-11-20 11:32:51,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:51,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:51,896 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:51,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:51,897 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2022-11-20 11:32:51,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:51,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540937040] [2022-11-20 11:32:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:51,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:51,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:51,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:32:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-20 11:32:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 11:32:51,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540937040] [2022-11-20 11:32:51,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540937040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:51,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783752300] [2022-11-20 11:32:51,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:51,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:51,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:51,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:52,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 11:32:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 11:32:52,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:32:52,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:52,302 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-20 11:32:52,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783752300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:52,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:52,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-11-20 11:32:52,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235360646] [2022-11-20 11:32:52,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:52,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 11:32:52,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:52,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 11:32:52,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-20 11:32:52,304 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) [2022-11-20 11:32:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:52,552 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2022-11-20 11:32:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 11:32:52,553 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 [2022-11-20 11:32:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:52,559 INFO L225 Difference]: With dead ends: 2467 [2022-11-20 11:32:52,559 INFO L226 Difference]: Without dead ends: 869 [2022-11-20 11:32:52,593 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 [2022-11-20 11:32:52,594 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 [2022-11-20 11:32:52,595 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] [2022-11-20 11:32:52,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-20 11:32:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2022-11-20 11:32:52,678 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) [2022-11-20 11:32:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2022-11-20 11:32:52,684 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2022-11-20 11:32:52,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:52,684 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2022-11-20 11:32:52,684 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) [2022-11-20 11:32:52,685 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2022-11-20 11:32:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 11:32:52,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:52,686 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 11:32:52,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 11:32:52,892 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-11-20 11:32:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:52,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388309798] [2022-11-20 11:32:52,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:53,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:53,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388309798] [2022-11-20 11:32:53,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388309798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:53,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429917196] [2022-11-20 11:32:53,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:32:53,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:53,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:53,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:53,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 11:32:53,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:32:53,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:32:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:53,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:32:53,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429917196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:53,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:53,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-20 11:32:53,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849703557] [2022-11-20 11:32:53,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:53,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:32:53,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:53,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:32:53,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:32:53,391 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) [2022-11-20 11:32:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:54,198 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2022-11-20 11:32:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:32:54,199 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 [2022-11-20 11:32:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:54,209 INFO L225 Difference]: With dead ends: 1623 [2022-11-20 11:32:54,209 INFO L226 Difference]: Without dead ends: 1622 [2022-11-20 11:32:54,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:32:54,212 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:54,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 383 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:32:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-11-20 11:32:54,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2022-11-20 11:32:54,389 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) [2022-11-20 11:32:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2022-11-20 11:32:54,397 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2022-11-20 11:32:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:54,397 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2022-11-20 11:32:54,397 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) [2022-11-20 11:32:54,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2022-11-20 11:32:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 11:32:54,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:54,400 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] [2022-11-20 11:32:54,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:54,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 11:32:54,606 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-11-20 11:32:54,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:54,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947198469] [2022-11-20 11:32:54,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:54,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:54,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:54,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:32:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:54,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947198469] [2022-11-20 11:32:54,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947198469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:54,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207057628] [2022-11-20 11:32:54,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:32:54,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:54,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:54,776 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:54,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 11:32:54,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:32:54,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:32:54,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-20 11:32:54,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:54,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:32:55,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207057628] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:55,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:55,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-20 11:32:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124113346] [2022-11-20 11:32:55,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:55,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 11:32:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 11:32:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-20 11:32:55,189 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) [2022-11-20 11:32:56,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:32:56,682 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2022-11-20 11:32:56,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:32:56,682 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 [2022-11-20 11:32:56,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:32:56,696 INFO L225 Difference]: With dead ends: 3056 [2022-11-20 11:32:56,696 INFO L226 Difference]: Without dead ends: 2163 [2022-11-20 11:32:56,705 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 [2022-11-20 11:32:56,706 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 244 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:32:56,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 258 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:32:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-11-20 11:32:56,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2022-11-20 11:32:56,934 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) [2022-11-20 11:32:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2022-11-20 11:32:56,941 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2022-11-20 11:32:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:32:56,942 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2022-11-20 11:32:56,942 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) [2022-11-20 11:32:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2022-11-20 11:32:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-20 11:32:56,943 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:32:56,944 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] [2022-11-20 11:32:56,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 11:32:57,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 11:32:57,149 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:32:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:32:57,150 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-11-20 11:32:57,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:32:57,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122918473] [2022-11-20 11:32:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:57,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:32:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:57,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:32:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:57,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:32:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:57,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:32:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:57,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:32:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:32:57,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:32:57,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122918473] [2022-11-20 11:32:57,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122918473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:32:57,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728811862] [2022-11-20 11:32:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:32:57,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:32:57,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:32:57,419 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:32:57,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 11:32:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:32:57,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:32:57,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:32:57,536 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:32:57,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:32:58,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:32:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728811862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:32:58,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:32:58,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-20 11:32:58,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614395675] [2022-11-20 11:32:58,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:32:58,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 11:32:58,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:32:58,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 11:32:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:32:58,098 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) [2022-11-20 11:33:00,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:00,223 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2022-11-20 11:33:00,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 11:33:00,224 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 [2022-11-20 11:33:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:00,263 INFO L225 Difference]: With dead ends: 4064 [2022-11-20 11:33:00,264 INFO L226 Difference]: Without dead ends: 4060 [2022-11-20 11:33:00,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 11:33:00,270 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:00,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 244 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:33:00,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-11-20 11:33:00,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2022-11-20 11:33:00,688 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) [2022-11-20 11:33:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2022-11-20 11:33:00,711 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2022-11-20 11:33:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:00,712 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2022-11-20 11:33:00,712 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) [2022-11-20 11:33:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2022-11-20 11:33:00,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 11:33:00,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:00,715 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:00,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:00,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:00,921 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:00,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:00,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-11-20 11:33:00,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:00,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675315267] [2022-11-20 11:33:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:00,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:33:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675315267] [2022-11-20 11:33:01,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675315267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:01,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821207007] [2022-11-20 11:33:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:01,144 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:01,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 11:33:01,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:01,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-20 11:33:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:33:01,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-20 11:33:01,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821207007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:01,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:01,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-20 11:33:01,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000149276] [2022-11-20 11:33:01,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:01,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-20 11:33:01,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:01,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-20 11:33:01,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-20 11:33:01,543 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) [2022-11-20 11:33:03,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:03,154 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2022-11-20 11:33:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 11:33:03,155 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 [2022-11-20 11:33:03,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:03,239 INFO L225 Difference]: With dead ends: 7961 [2022-11-20 11:33:03,239 INFO L226 Difference]: Without dead ends: 7960 [2022-11-20 11:33:03,247 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 [2022-11-20 11:33:03,248 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 556 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:03,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [561 Valid, 349 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 11:33:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2022-11-20 11:33:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2022-11-20 11:33:04,452 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) [2022-11-20 11:33:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2022-11-20 11:33:04,524 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2022-11-20 11:33:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:04,525 INFO L495 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2022-11-20 11:33:04,526 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) [2022-11-20 11:33:04,526 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2022-11-20 11:33:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 11:33:04,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:04,529 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] [2022-11-20 11:33:04,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:04,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:04,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-11-20 11:33:04,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:04,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482934948] [2022-11-20 11:33:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:04,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:04,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:33:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:05,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:33:05,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:33:05,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:05,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482934948] [2022-11-20 11:33:05,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482934948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:05,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230036648] [2022-11-20 11:33:05,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:05,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:05,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:05,132 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:05,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 11:33:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:05,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 11:33:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 11:33:05,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:33:05,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230036648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:05,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:05,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-20 11:33:05,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808343471] [2022-11-20 11:33:05,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:05,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 11:33:05,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 11:33:05,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-20 11:33:05,951 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) [2022-11-20 11:33:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:09,772 INFO L93 Difference]: Finished difference Result 27422 states and 98822 transitions. [2022-11-20 11:33:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 11:33:09,773 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 56 [2022-11-20 11:33:09,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:10,156 INFO L225 Difference]: With dead ends: 27422 [2022-11-20 11:33:10,156 INFO L226 Difference]: Without dead ends: 20893 [2022-11-20 11:33:10,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 11:33:10,366 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 157 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:10,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 317 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:33:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2022-11-20 11:33:13,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 16604. [2022-11-20 11:33:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16604 states, 10900 states have (on average 1.0543119266055045) internal successors, (11492), 10965 states have internal predecessors, (11492), 3293 states have call successors, (3293), 380 states have call predecessors, (3293), 2407 states have return successors, (45164), 5258 states have call predecessors, (45164), 3282 states have call successors, (45164) [2022-11-20 11:33:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2022-11-20 11:33:14,153 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2022-11-20 11:33:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:14,153 INFO L495 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2022-11-20 11:33:14,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-20 11:33:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2022-11-20 11:33:14,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 11:33:14,157 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:14,157 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:14,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:14,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 11:33:14,363 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:14,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:14,363 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 2 times [2022-11-20 11:33:14,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:14,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438944733] [2022-11-20 11:33:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:14,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:33:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:14,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:14,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:14,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:15,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:33:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:33:15,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:15,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438944733] [2022-11-20 11:33:15,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438944733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:15,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616469341] [2022-11-20 11:33:15,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:33:15,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:15,068 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:15,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 11:33:15,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:33:15,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 11:33:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-20 11:33:15,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 80 proven. 9 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-20 11:33:16,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616469341] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:16,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:16,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-11-20 11:33:16,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327123530] [2022-11-20 11:33:16,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:16,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 11:33:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:16,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 11:33:16,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 11:33:16,554 INFO L87 Difference]: Start difference. First operand 16604 states and 59949 transitions. Second operand has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-20 11:33:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:19,015 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2022-11-20 11:33:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 11:33:19,016 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) Word has length 73 [2022-11-20 11:33:19,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:19,083 INFO L225 Difference]: With dead ends: 25458 [2022-11-20 11:33:19,083 INFO L226 Difference]: Without dead ends: 10209 [2022-11-20 11:33:19,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 11:33:19,360 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 194 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:19,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 378 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 11:33:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2022-11-20 11:33:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2022-11-20 11:33:20,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9706 states, 6743 states have (on average 1.0793415393741659) internal successors, (7278), 6950 states have internal predecessors, (7278), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1059 states have return successors, (6461), 2351 states have call predecessors, (6461), 1892 states have call successors, (6461) [2022-11-20 11:33:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2022-11-20 11:33:20,698 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 73 [2022-11-20 11:33:20,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:20,698 INFO L495 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2022-11-20 11:33:20,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5) internal successors, (80), 23 states have internal predecessors, (80), 7 states have call successors, (9), 5 states have call predecessors, (9), 8 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-20 11:33:20,699 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2022-11-20 11:33:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 11:33:20,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:20,703 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 6, 6, 6, 6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:20,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:20,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 11:33:20,917 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:20,918 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-11-20 11:33:20,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:20,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164363895] [2022-11-20 11:33:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:20,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:21,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:33:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:21,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:33:21,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:21,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164363895] [2022-11-20 11:33:21,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164363895] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:21,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317007345] [2022-11-20 11:33:21,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:33:21,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:21,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:21,200 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:21,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 11:33:21,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-20 11:33:21,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:21,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 11:33:21,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:33:21,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 11:33:21,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317007345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:21,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:22,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-11-20 11:33:22,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574808373] [2022-11-20 11:33:22,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:22,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-20 11:33:22,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-20 11:33:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-20 11:33:22,044 INFO L87 Difference]: Start difference. First operand 9706 states and 15639 transitions. Second operand has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:33:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:23,652 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2022-11-20 11:33:23,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 11:33:23,653 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2022-11-20 11:33:23,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:23,708 INFO L225 Difference]: With dead ends: 10357 [2022-11-20 11:33:23,708 INFO L226 Difference]: Without dead ends: 10356 [2022-11-20 11:33:23,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 11:33:23,716 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 236 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:23,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 232 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 11:33:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2022-11-20 11:33:24,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2022-11-20 11:33:24,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9814 states, 6815 states have (on average 1.074688187820983) internal successors, (7324), 7022 states have internal predecessors, (7324), 1900 states have call successors, (1900), 404 states have call predecessors, (1900), 1095 states have return successors, (6555), 2387 states have call predecessors, (6555), 1892 states have call successors, (6555) [2022-11-20 11:33:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2022-11-20 11:33:25,029 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2022-11-20 11:33:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:25,030 INFO L495 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2022-11-20 11:33:25,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.1818181818181817) internal successors, (105), 22 states have internal predecessors, (105), 11 states have call successors, (13), 11 states have call predecessors, (13), 5 states have return successors, (5), 4 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-20 11:33:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2022-11-20 11:33:25,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 11:33:25,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:25,035 INFO L195 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:25,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:25,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-20 11:33:25,240 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1597804450, now seen corresponding path program 2 times [2022-11-20 11:33:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:25,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040256939] [2022-11-20 11:33:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:25,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-20 11:33:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:33:25,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:33:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 98 proven. 28 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-20 11:33:25,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040256939] [2022-11-20 11:33:25,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040256939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:25,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379172839] [2022-11-20 11:33:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:33:25,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:25,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:25,517 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:25,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 11:33:25,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:33:25,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:25,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 11:33:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 15 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-20 11:33:25,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 100 proven. 26 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-20 11:33:26,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379172839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:26,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:26,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-11-20 11:33:26,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441814969] [2022-11-20 11:33:26,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:26,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 11:33:26,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:26,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 11:33:26,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-20 11:33:26,129 INFO L87 Difference]: Start difference. First operand 9814 states and 15779 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-20 11:33:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:27,109 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2022-11-20 11:33:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:33:27,110 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) Word has length 88 [2022-11-20 11:33:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:27,197 INFO L225 Difference]: With dead ends: 18932 [2022-11-20 11:33:27,198 INFO L226 Difference]: Without dead ends: 10758 [2022-11-20 11:33:27,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-20 11:33:27,283 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 104 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:27,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 85 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:33:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2022-11-20 11:33:28,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2022-11-20 11:33:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9808 states, 6812 states have (on average 1.0747210804462712) internal successors, (7321), 7019 states have internal predecessors, (7321), 1897 states have call successors, (1897), 404 states have call predecessors, (1897), 1095 states have return successors, (6475), 2384 states have call predecessors, (6475), 1862 states have call successors, (6475) [2022-11-20 11:33:28,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2022-11-20 11:33:28,743 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 88 [2022-11-20 11:33:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:28,744 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2022-11-20 11:33:28,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 12 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (14), 6 states have call predecessors, (14), 11 states have call successors, (14) [2022-11-20 11:33:28,744 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2022-11-20 11:33:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-20 11:33:28,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:28,751 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:28,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:28,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-20 11:33:28,958 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:28,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-11-20 11:33:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:28,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006956920] [2022-11-20 11:33:28,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:28,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:33:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:33:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 11:33:29,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-20 11:33:29,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-20 11:33:29,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006956920] [2022-11-20 11:33:29,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006956920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:29,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607169820] [2022-11-20 11:33:29,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:33:29,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:29,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:29,391 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:29,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 11:33:29,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 11:33:29,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 11:33:29,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-20 11:33:29,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-20 11:33:30,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607169820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:30,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:30,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-11-20 11:33:30,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507378196] [2022-11-20 11:33:30,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:30,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 11:33:30,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:30,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 11:33:30,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-20 11:33:30,539 INFO L87 Difference]: Start difference. First operand 9808 states and 15693 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-20 11:33:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:32,113 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2022-11-20 11:33:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 11:33:32,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) Word has length 99 [2022-11-20 11:33:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:32,229 INFO L225 Difference]: With dead ends: 20497 [2022-11-20 11:33:32,230 INFO L226 Difference]: Without dead ends: 12358 [2022-11-20 11:33:32,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 206 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2022-11-20 11:33:32,330 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:32,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 157 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 11:33:32,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2022-11-20 11:33:34,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2022-11-20 11:33:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11997 states, 8101 states have (on average 1.054684606838662) internal successors, (8544), 8288 states have internal predecessors, (8544), 2417 states have call successors, (2417), 424 states have call predecessors, (2417), 1475 states have return successors, (8115), 3284 states have call predecessors, (8115), 2362 states have call successors, (8115) [2022-11-20 11:33:34,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-11-20 11:33:34,239 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-11-20 11:33:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:34,240 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-11-20 11:33:34,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 9 states have call successors, (14), 2 states have call predecessors, (14), 7 states have return successors, (17), 5 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-20 11:33:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-11-20 11:33:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-20 11:33:34,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:34,251 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 7, 7, 7, 7, 6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:34,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:34,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 11:33:34,458 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:34,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:34,458 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-11-20 11:33:34,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:34,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186558550] [2022-11-20 11:33:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:34,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:33:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:34,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:33:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 11:33:34,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:34,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186558550] [2022-11-20 11:33:34,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186558550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:34,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286471914] [2022-11-20 11:33:34,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:33:34,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:34,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:34,984 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:35,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 11:33:35,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-20 11:33:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:35,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 11:33:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-20 11:33:35,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-20 11:33:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286471914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:35,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:35,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-11-20 11:33:35,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277482102] [2022-11-20 11:33:35,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 11:33:35,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:35,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 11:33:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-20 11:33:35,508 INFO L87 Difference]: Start difference. First operand 11997 states and 19076 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 11:33:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:38,421 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-11-20 11:33:38,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 11:33:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) Word has length 88 [2022-11-20 11:33:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:38,496 INFO L225 Difference]: With dead ends: 20852 [2022-11-20 11:33:38,496 INFO L226 Difference]: Without dead ends: 10359 [2022-11-20 11:33:38,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-11-20 11:33:38,624 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 242 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:38,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 145 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 11:33:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-20 11:33:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-11-20 11:33:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 5968 states have (on average 1.0464142091152815) internal successors, (6245), 6144 states have internal predecessors, (6245), 1711 states have call successors, (1711), 352 states have call predecessors, (1711), 1058 states have return successors, (4097), 2244 states have call predecessors, (4097), 1677 states have call successors, (4097) [2022-11-20 11:33:39,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-11-20 11:33:39,882 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-11-20 11:33:39,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:39,882 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-11-20 11:33:39,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 22 states have internal predecessors, (108), 11 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (10), 9 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-20 11:33:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-11-20 11:33:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-20 11:33:39,887 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:39,887 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:39,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:40,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 11:33:40,096 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-11-20 11:33:40,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:40,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786260865] [2022-11-20 11:33:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-20 11:33:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:40,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:33:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:33:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:33:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:33:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:33:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-20 11:33:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786260865] [2022-11-20 11:33:40,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786260865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:40,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131183876] [2022-11-20 11:33:40,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 11:33:40,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:40,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:40,793 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:40,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 11:33:40,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 11:33:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:40,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 11:33:40,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-20 11:33:41,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-20 11:33:42,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131183876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:42,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:42,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-11-20 11:33:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638229090] [2022-11-20 11:33:42,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 11:33:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 11:33:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 11:33:42,960 INFO L87 Difference]: Start difference. First operand 8741 states and 12053 transitions. Second operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-20 11:33:49,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:49,235 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-11-20 11:33:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-20 11:33:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) Word has length 90 [2022-11-20 11:33:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:49,410 INFO L225 Difference]: With dead ends: 29169 [2022-11-20 11:33:49,410 INFO L226 Difference]: Without dead ends: 28067 [2022-11-20 11:33:49,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12289 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-11-20 11:33:49,447 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 362 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 1102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1102 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:49,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 275 Invalid, 2224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1102 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 11:33:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-11-20 11:33:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-11-20 11:33:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17311 states, 11232 states have (on average 1.0269764957264957) internal successors, (11535), 11391 states have internal predecessors, (11535), 3626 states have call successors, (3626), 460 states have call predecessors, (3626), 2449 states have return successors, (11770), 5459 states have call predecessors, (11770), 3572 states have call successors, (11770) [2022-11-20 11:33:51,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-11-20 11:33:51,591 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-11-20 11:33:51,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:33:51,592 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-11-20 11:33:51,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 33 states have internal predecessors, (78), 9 states have call successors, (11), 3 states have call predecessors, (11), 14 states have return successors, (17), 16 states have call predecessors, (17), 7 states have call successors, (17) [2022-11-20 11:33:51,592 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-11-20 11:33:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-20 11:33:51,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:33:51,597 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-20 11:33:51,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 11:33:51,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 11:33:51,803 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:33:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:33:51,804 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-11-20 11:33:51,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:33:51,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366502247] [2022-11-20 11:33:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:33:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:33:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:33:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:52,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:33:52,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366502247] [2022-11-20 11:33:52,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366502247] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:33:52,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742216343] [2022-11-20 11:33:52,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 11:33:52,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:33:52,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:33:52,232 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:33:52,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 11:33:52,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 11:33:52,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:33:52,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 11:33:52,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:33:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:52,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:33:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:33:53,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742216343] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:33:53,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:33:53,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-20 11:33:53,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102235027] [2022-11-20 11:33:53,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:33:53,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:33:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:33:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:33:53,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:33:53,144 INFO L87 Difference]: Start difference. First operand 17311 states and 26931 transitions. Second operand has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:33:57,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:33:57,201 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-11-20 11:33:57,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 11:33:57,202 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-20 11:33:57,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:33:57,342 INFO L225 Difference]: With dead ends: 28628 [2022-11-20 11:33:57,343 INFO L226 Difference]: Without dead ends: 28627 [2022-11-20 11:33:57,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 11:33:57,355 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 927 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:33:57,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [931 Valid, 669 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 11:33:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-11-20 11:34:00,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-11-20 11:34:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28627 states, 18540 states have (on average 1.0279935275080907) internal successors, (19059), 18915 states have internal predecessors, (19059), 5846 states have call successors, (5846), 676 states have call predecessors, (5846), 4237 states have return successors, (19630), 9035 states have call predecessors, (19630), 5792 states have call successors, (19630) [2022-11-20 11:34:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-11-20 11:34:00,211 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-11-20 11:34:00,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:00,211 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-11-20 11:34:00,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 3.533333333333333) internal successors, (159), 26 states have internal predecessors, (159), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:00,211 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-11-20 11:34:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-20 11:34:00,225 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:00,225 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:00,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:00,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:00,430 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:34:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:00,431 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-11-20 11:34:00,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:00,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751305981] [2022-11-20 11:34:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:00,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:01,127 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:34:01,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751305981] [2022-11-20 11:34:01,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751305981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:01,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748458359] [2022-11-20 11:34:01,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:34:01,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:01,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:01,129 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:01,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 11:34:01,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:34:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:34:01,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 11:34:01,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:34:01,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:34:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 11:34:02,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748458359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:34:02,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:34:02,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-20 11:34:02,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552922239] [2022-11-20 11:34:02,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:34:02,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 11:34:02,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:34:02,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 11:34:02,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 11:34:02,293 INFO L87 Difference]: Start difference. First operand 28627 states and 44535 transitions. Second operand has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:34:09,807 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-11-20 11:34:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-20 11:34:09,808 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2022-11-20 11:34:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:34:10,083 INFO L225 Difference]: With dead ends: 64728 [2022-11-20 11:34:10,083 INFO L226 Difference]: Without dead ends: 64727 [2022-11-20 11:34:10,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 11:34:10,111 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1728 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1731 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 11:34:10,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1731 Valid, 576 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 11:34:10,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-11-20 11:34:16,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-11-20 11:34:16,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64675 states, 41976 states have (on average 1.028659233847913) internal successors, (43179), 42843 states have internal predecessors, (43179), 13190 states have call successors, (13190), 1564 states have call predecessors, (13190), 9505 states have return successors, (44950), 20267 states have call predecessors, (44950), 13076 states have call successors, (44950) [2022-11-20 11:34:16,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-11-20 11:34:16,740 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-11-20 11:34:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:34:16,740 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-11-20 11:34:16,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.382978723404255) internal successors, (206), 26 states have internal predecessors, (206), 22 states have call successors, (40), 22 states have call predecessors, (40), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 11:34:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-11-20 11:34:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-20 11:34:16,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:34:16,762 INFO L195 NwaCegarLoop]: trace histogram [26, 19, 17, 15, 15, 15, 14, 14, 14, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 11:34:16,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 11:34:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 11:34:16,968 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-20 11:34:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:34:16,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1849734619, now seen corresponding path program 1 times [2022-11-20 11:34:16,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:34:16,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969749031] [2022-11-20 11:34:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:34:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:17,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-11-20 11:34:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:34:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:34:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:34:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:34:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:34:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:34:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-20 11:34:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:34:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:34:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:34:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-20 11:34:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-20 11:34:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-20 11:34:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-20 11:34:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-20 11:34:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-20 11:34:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:18,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 634 proven. 224 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2022-11-20 11:34:18,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:34:18,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969749031] [2022-11-20 11:34:18,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969749031] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:34:18,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549030325] [2022-11-20 11:34:18,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:34:18,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:34:18,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:34:18,972 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:34:18,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07afbf37-0d2c-49ae-ae47-588fe26b7384/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 11:34:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:34:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 11:34:19,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:34:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1713 backedges. 623 proven. 216 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2022-11-20 11:34:19,356 INFO L328 TraceCheckSpWp]: Computing backward predicates...