./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 b5237d83 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_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a --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-b5237d8 [2022-11-21 13:59:15,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:59:15,206 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:59:15,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:59:15,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:59:15,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:59:15,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:59:15,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:59:15,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:59:15,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:59:15,242 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:59:15,243 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:59:15,244 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:59:15,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:59:15,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:59:15,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:59:15,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:59:15,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:59:15,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:59:15,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:59:15,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:59:15,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:59:15,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:59:15,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:59:15,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:59:15,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:59:15,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:59:15,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:59:15,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:59:15,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:59:15,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:59:15,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:59:15,283 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:59:15,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:59:15,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:59:15,289 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:59:15,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:59:15,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:59:15,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:59:15,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:59:15,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:59:15,311 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-21 13:59:15,355 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:59:15,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:59:15,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:59:15,356 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:59:15,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:59:15,357 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:59:15,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:59:15,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:59:15,358 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:59:15,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:59:15,359 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:59:15,359 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 13:59:15,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:59:15,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:59:15,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:59:15,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:59:15,360 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:59:15,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:59:15,361 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-21 13:59:15,361 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:59:15,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:59:15,361 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:59:15,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:59:15,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:59:15,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:59:15,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:59:15,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:59:15,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:59:15,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:59:15,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:59:15,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:59:15,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:59:15,364 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:59:15,365 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:59:15,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:59:15,365 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_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2022-11-21 13:59:15,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:59:15,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:59:15,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:59:15,803 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:59:15,803 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:59:15,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/recursive/Ackermann04.c [2022-11-21 13:59:19,291 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:59:19,584 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:59:19,584 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/sv-benchmarks/c/recursive/Ackermann04.c [2022-11-21 13:59:19,591 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/data/5023abcd7/a2a3f2e0e00240e7b67a2568f339c63b/FLAG2dc48839f [2022-11-21 13:59:19,610 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/data/5023abcd7/a2a3f2e0e00240e7b67a2568f339c63b [2022-11-21 13:59:19,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:59:19,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:59:19,630 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:59:19,630 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:59:19,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:59:19,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:19,636 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d03aa7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19, skipping insertion in model container [2022-11-21 13:59:19,637 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:19,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:59:19,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:59:19,855 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_62c81860-94c9-4187-bad1-1e8a06b3481b/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2022-11-21 13:59:19,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:59:19,876 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:59:19,909 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_62c81860-94c9-4187-bad1-1e8a06b3481b/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2022-11-21 13:59:19,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:59:19,925 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:59:19,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19 WrapperNode [2022-11-21 13:59:19,926 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:59:19,927 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:59:19,928 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:59:19,928 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:59:19,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:19,947 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:19,970 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-11-21 13:59:19,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:59:19,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:59:19,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:59:19,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:59:19,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:19,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:19,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,000 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,003 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,006 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:59:20,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:59:20,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:59:20,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:59:20,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (1/1) ... [2022-11-21 13:59:20,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:59:20,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:20,064 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:59:20,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:59:20,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:59:20,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:59:20,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:59:20,110 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-11-21 13:59:20,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-11-21 13:59:20,110 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:59:20,194 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:59:20,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:59:20,504 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:59:20,527 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:59:20,527 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-21 13:59:20,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:59:20 BoogieIcfgContainer [2022-11-21 13:59:20,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:59:20,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:59:20,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:59:20,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:59:20,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:59:19" (1/3) ... [2022-11-21 13:59:20,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15314cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:59:20, skipping insertion in model container [2022-11-21 13:59:20,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:59:19" (2/3) ... [2022-11-21 13:59:20,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15314cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:59:20, skipping insertion in model container [2022-11-21 13:59:20,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:59:20" (3/3) ... [2022-11-21 13:59:20,556 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2022-11-21 13:59:20,580 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:59:20,581 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-21 13:59:20,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:59:20,707 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;@7c25dab6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:59:20,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-21 13:59:20,712 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) [2022-11-21 13:59:20,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-21 13:59:20,721 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:20,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:20,723 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:20,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:20,731 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2022-11-21 13:59:20,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:20,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682884994] [2022-11-21 13:59:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:21,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:21,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682884994] [2022-11-21 13:59:21,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682884994] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:21,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:21,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:59:21,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111105679] [2022-11-21 13:59:21,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:21,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:21,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:21,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:59:21,151 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) [2022-11-21 13:59:21,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:21,353 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2022-11-21 13:59:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:59:21,359 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 [2022-11-21 13:59:21,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:21,375 INFO L225 Difference]: With dead ends: 73 [2022-11-21 13:59:21,375 INFO L226 Difference]: Without dead ends: 59 [2022-11-21 13:59:21,381 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 [2022-11-21 13:59:21,390 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 [2022-11-21 13:59:21,393 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] [2022-11-21 13:59:21,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-21 13:59:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2022-11-21 13:59:21,464 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) [2022-11-21 13:59:21,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-21 13:59:21,469 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2022-11-21 13:59:21,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:21,469 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-21 13:59:21,470 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) [2022-11-21 13:59:21,470 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-21 13:59:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:59:21,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:21,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:59:21,481 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:21,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2022-11-21 13:59:21,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:21,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25785142] [2022-11-21 13:59:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:21,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:21,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:21,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25785142] [2022-11-21 13:59:21,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25785142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:21,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:21,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:59:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683387727] [2022-11-21 13:59:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:21,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:59:21,595 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) [2022-11-21 13:59:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:21,673 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-11-21 13:59:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 13:59:21,674 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 [2022-11-21 13:59:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:21,675 INFO L225 Difference]: With dead ends: 51 [2022-11-21 13:59:21,675 INFO L226 Difference]: Without dead ends: 49 [2022-11-21 13:59:21,676 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 [2022-11-21 13:59:21,678 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 [2022-11-21 13:59:21,679 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] [2022-11-21 13:59:21,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-21 13:59:21,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-21 13:59:21,698 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) [2022-11-21 13:59:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-21 13:59:21,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2022-11-21 13:59:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:21,708 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-21 13:59:21,709 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) [2022-11-21 13:59:21,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-21 13:59:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-21 13:59:21,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:21,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:21,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:59:21,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:21,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2022-11-21 13:59:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:21,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101204807] [2022-11-21 13:59:21,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:21,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:21,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101204807] [2022-11-21 13:59:21,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101204807] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:21,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:21,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:59:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021514096] [2022-11-21 13:59:21,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:21,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:21,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:21,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:21,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:59:21,910 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) [2022-11-21 13:59:22,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:22,040 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-21 13:59:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:59:22,041 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 [2022-11-21 13:59:22,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:22,043 INFO L225 Difference]: With dead ends: 76 [2022-11-21 13:59:22,044 INFO L226 Difference]: Without dead ends: 75 [2022-11-21 13:59:22,044 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 [2022-11-21 13:59:22,046 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 [2022-11-21 13:59:22,047 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] [2022-11-21 13:59:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-21 13:59:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2022-11-21 13:59:22,064 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) [2022-11-21 13:59:22,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-21 13:59:22,067 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 9 [2022-11-21 13:59:22,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:22,067 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-21 13:59:22,068 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) [2022-11-21 13:59:22,068 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-21 13:59:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-21 13:59:22,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:22,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:59:22,070 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2022-11-21 13:59:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:22,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509186860] [2022-11-21 13:59:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:22,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:22,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509186860] [2022-11-21 13:59:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509186860] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:22,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:22,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:59:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517152007] [2022-11-21 13:59:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:22,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:22,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:22,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:59:22,182 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) [2022-11-21 13:59:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:22,343 INFO L93 Difference]: Finished difference Result 116 states and 156 transitions. [2022-11-21 13:59:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:59:22,346 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 [2022-11-21 13:59:22,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:22,350 INFO L225 Difference]: With dead ends: 116 [2022-11-21 13:59:22,350 INFO L226 Difference]: Without dead ends: 108 [2022-11-21 13:59:22,351 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 [2022-11-21 13:59:22,352 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 [2022-11-21 13:59:22,353 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] [2022-11-21 13:59:22,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-21 13:59:22,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-21 13:59:22,392 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) [2022-11-21 13:59:22,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-11-21 13:59:22,395 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 10 [2022-11-21 13:59:22,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-11-21 13:59:22,396 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) [2022-11-21 13:59:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-11-21 13:59:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-21 13:59:22,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:22,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 13:59:22,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1072007509, now seen corresponding path program 1 times [2022-11-21 13:59:22,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:22,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496271063] [2022-11-21 13:59:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:22,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:22,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496271063] [2022-11-21 13:59:22,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496271063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:22,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:22,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:59:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23607785] [2022-11-21 13:59:22,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:22,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-21 13:59:22,580 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) [2022-11-21 13:59:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:22,724 INFO L93 Difference]: Finished difference Result 109 states and 140 transitions. [2022-11-21 13:59:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:59:22,725 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 [2022-11-21 13:59:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:22,731 INFO L225 Difference]: With dead ends: 109 [2022-11-21 13:59:22,731 INFO L226 Difference]: Without dead ends: 108 [2022-11-21 13:59:22,732 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 [2022-11-21 13:59:22,742 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 [2022-11-21 13:59:22,742 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] [2022-11-21 13:59:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-21 13:59:22,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-11-21 13:59:22,782 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) [2022-11-21 13:59:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-11-21 13:59:22,791 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 12 [2022-11-21 13:59:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:22,794 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-11-21 13:59:22,794 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) [2022-11-21 13:59:22,794 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-11-21 13:59:22,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 13:59:22,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:22,797 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:22,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:59:22,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2022-11-21 13:59:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:22,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119479772] [2022-11-21 13:59:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:22,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:22,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:22,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119479772] [2022-11-21 13:59:22,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119479772] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:22,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:59:22,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:59:22,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968611750] [2022-11-21 13:59:22,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:22,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:59:22,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:22,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:59:22,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:59:22,902 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) [2022-11-21 13:59:22,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:22,996 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2022-11-21 13:59:22,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:59:22,999 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 [2022-11-21 13:59:22,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:23,000 INFO L225 Difference]: With dead ends: 168 [2022-11-21 13:59:23,000 INFO L226 Difference]: Without dead ends: 97 [2022-11-21 13:59:23,002 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 [2022-11-21 13:59:23,004 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 [2022-11-21 13:59:23,004 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] [2022-11-21 13:59:23,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-21 13:59:23,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-11-21 13:59:23,033 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) [2022-11-21 13:59:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2022-11-21 13:59:23,039 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2022-11-21 13:59:23,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:23,041 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2022-11-21 13:59:23,042 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) [2022-11-21 13:59:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2022-11-21 13:59:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-21 13:59:23,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:23,050 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:23,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:59:23,051 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:23,052 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2022-11-21 13:59:23,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:23,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815585127] [2022-11-21 13:59:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:23,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:23,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815585127] [2022-11-21 13:59:23,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815585127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:23,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912037782] [2022-11-21 13:59:23,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:23,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:23,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:23,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:23,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:59:23,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:23,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:59:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:23,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:23,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912037782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:23,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:23,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-21 13:59:23,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646049857] [2022-11-21 13:59:23,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:59:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:23,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:59:23,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:59:23,532 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) [2022-11-21 13:59:23,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:23,924 INFO L93 Difference]: Finished difference Result 274 states and 356 transitions. [2022-11-21 13:59:23,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:59:23,925 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 [2022-11-21 13:59:23,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:23,935 INFO L225 Difference]: With dead ends: 274 [2022-11-21 13:59:23,936 INFO L226 Difference]: Without dead ends: 272 [2022-11-21 13:59:23,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:59:23,941 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 [2022-11-21 13:59:23,942 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] [2022-11-21 13:59:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-21 13:59:24,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 236. [2022-11-21 13:59:24,010 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) [2022-11-21 13:59:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 299 transitions. [2022-11-21 13:59:24,015 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 299 transitions. Word has length 16 [2022-11-21 13:59:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:24,016 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 299 transitions. [2022-11-21 13:59:24,016 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) [2022-11-21 13:59:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 299 transitions. [2022-11-21 13:59:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-21 13:59:24,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:24,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:24,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:59:24,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:24,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:24,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2022-11-21 13:59:24,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:24,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71844172] [2022-11-21 13:59:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:24,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:24,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71844172] [2022-11-21 13:59:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71844172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:24,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64144413] [2022-11-21 13:59:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:24,365 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:24,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:59:24,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:24,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:59:24,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:24,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:59:24,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64144413] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:24,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:59:24,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-11-21 13:59:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041384827] [2022-11-21 13:59:24,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:24,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:24,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:24,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:59:24,535 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) [2022-11-21 13:59:24,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:24,741 INFO L93 Difference]: Finished difference Result 328 states and 437 transitions. [2022-11-21 13:59:24,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 13:59:24,742 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 [2022-11-21 13:59:24,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:24,745 INFO L225 Difference]: With dead ends: 328 [2022-11-21 13:59:24,746 INFO L226 Difference]: Without dead ends: 327 [2022-11-21 13:59:24,746 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 [2022-11-21 13:59:24,747 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 [2022-11-21 13:59:24,748 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] [2022-11-21 13:59:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-21 13:59:24,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 293. [2022-11-21 13:59:24,849 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) [2022-11-21 13:59:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 373 transitions. [2022-11-21 13:59:24,853 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 373 transitions. Word has length 17 [2022-11-21 13:59:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:24,854 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 373 transitions. [2022-11-21 13:59:24,854 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) [2022-11-21 13:59:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 373 transitions. [2022-11-21 13:59:24,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-21 13:59:24,858 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:24,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:24,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:25,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:25,071 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:25,072 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2022-11-21 13:59:25,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:25,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487217176] [2022-11-21 13:59:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:25,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:25,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487217176] [2022-11-21 13:59:25,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487217176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:25,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945449575] [2022-11-21 13:59:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:25,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:25,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:25,207 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:25,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:59:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:59:25,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:25,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:25,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:25,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945449575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:25,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:25,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-21 13:59:25,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191057521] [2022-11-21 13:59:25,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:25,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:59:25,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:25,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:59:25,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:59:25,454 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) [2022-11-21 13:59:25,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:25,813 INFO L93 Difference]: Finished difference Result 591 states and 792 transitions. [2022-11-21 13:59:25,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:59:25,814 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 [2022-11-21 13:59:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:25,819 INFO L225 Difference]: With dead ends: 591 [2022-11-21 13:59:25,820 INFO L226 Difference]: Without dead ends: 590 [2022-11-21 13:59:25,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:59:25,821 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 [2022-11-21 13:59:25,822 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] [2022-11-21 13:59:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-21 13:59:25,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 521. [2022-11-21 13:59:25,885 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) [2022-11-21 13:59:25,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 649 transitions. [2022-11-21 13:59:25,891 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 649 transitions. Word has length 20 [2022-11-21 13:59:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:25,891 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 649 transitions. [2022-11-21 13:59:25,892 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) [2022-11-21 13:59:25,892 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 649 transitions. [2022-11-21 13:59:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-21 13:59:25,895 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:25,895 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] [2022-11-21 13:59:25,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:26,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 13:59:26,102 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:26,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2022-11-21 13:59:26,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:26,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234339471] [2022-11-21 13:59:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:26,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:59:26,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234339471] [2022-11-21 13:59:26,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234339471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:26,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716852882] [2022-11-21 13:59:26,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:26,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:26,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:26,264 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:26,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:59:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:26,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-21 13:59:26,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:59:26,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:59:26,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716852882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:26,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:26,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-11-21 13:59:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653864767] [2022-11-21 13:59:26,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:26,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-21 13:59:26,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-21 13:59:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-11-21 13:59:26,722 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) [2022-11-21 13:59:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:27,257 INFO L93 Difference]: Finished difference Result 870 states and 1257 transitions. [2022-11-21 13:59:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-21 13:59:27,258 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 [2022-11-21 13:59:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:27,265 INFO L225 Difference]: With dead ends: 870 [2022-11-21 13:59:27,266 INFO L226 Difference]: Without dead ends: 868 [2022-11-21 13:59:27,267 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 [2022-11-21 13:59:27,268 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 [2022-11-21 13:59:27,269 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] [2022-11-21 13:59:27,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-21 13:59:27,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 728. [2022-11-21 13:59:27,366 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) [2022-11-21 13:59:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 989 transitions. [2022-11-21 13:59:27,375 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 989 transitions. Word has length 24 [2022-11-21 13:59:27,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:27,376 INFO L495 AbstractCegarLoop]: Abstraction has 728 states and 989 transitions. [2022-11-21 13:59:27,376 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) [2022-11-21 13:59:27,376 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 989 transitions. [2022-11-21 13:59:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-21 13:59:27,377 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:27,378 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] [2022-11-21 13:59:27,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 13:59:27,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:27,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:27,586 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2022-11-21 13:59:27,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:27,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955971532] [2022-11-21 13:59:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:27,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:27,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:59:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955971532] [2022-11-21 13:59:27,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955971532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:27,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400079162] [2022-11-21 13:59:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:27,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:27,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:27,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:27,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:59:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:27,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:59:27,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-21 13:59:27,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-21 13:59:27,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400079162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:59:27,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-21 13:59:27,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2022-11-21 13:59:27,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399475328] [2022-11-21 13:59:27,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:27,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-21 13:59:27,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-21 13:59:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-21 13:59:27,931 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) [2022-11-21 13:59:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:28,129 INFO L93 Difference]: Finished difference Result 737 states and 999 transitions. [2022-11-21 13:59:28,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-21 13:59:28,130 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 [2022-11-21 13:59:28,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:28,138 INFO L225 Difference]: With dead ends: 737 [2022-11-21 13:59:28,138 INFO L226 Difference]: Without dead ends: 736 [2022-11-21 13:59:28,139 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 [2022-11-21 13:59:28,140 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 [2022-11-21 13:59:28,141 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] [2022-11-21 13:59:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-11-21 13:59:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 727. [2022-11-21 13:59:28,228 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) [2022-11-21 13:59:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 981 transitions. [2022-11-21 13:59:28,238 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 981 transitions. Word has length 25 [2022-11-21 13:59:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:28,239 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 981 transitions. [2022-11-21 13:59:28,240 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) [2022-11-21 13:59:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 981 transitions. [2022-11-21 13:59:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-21 13:59:28,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:28,242 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] [2022-11-21 13:59:28,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:28,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:28,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2022-11-21 13:59:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:28,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454878357] [2022-11-21 13:59:28,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:28,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:59:28,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:28,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454878357] [2022-11-21 13:59:28,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454878357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:28,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601974965] [2022-11-21 13:59:28,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:28,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:28,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:28,618 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:28,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 13:59:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:28,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:59:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:59:28,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:28,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 13:59:28,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601974965] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:28,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:59:28,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-21 13:59:28,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190400887] [2022-11-21 13:59:28,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:28,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-21 13:59:28,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:28,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-21 13:59:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-21 13:59:28,958 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) [2022-11-21 13:59:29,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:29,306 INFO L93 Difference]: Finished difference Result 886 states and 1251 transitions. [2022-11-21 13:59:29,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 13:59:29,308 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 [2022-11-21 13:59:29,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:29,314 INFO L225 Difference]: With dead ends: 886 [2022-11-21 13:59:29,314 INFO L226 Difference]: Without dead ends: 885 [2022-11-21 13:59:29,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:59:29,316 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:29,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 109 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 13:59:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-11-21 13:59:29,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 812. [2022-11-21 13:59:29,412 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) [2022-11-21 13:59:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1076 transitions. [2022-11-21 13:59:29,420 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1076 transitions. Word has length 28 [2022-11-21 13:59:29,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:29,421 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1076 transitions. [2022-11-21 13:59:29,421 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) [2022-11-21 13:59:29,421 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1076 transitions. [2022-11-21 13:59:29,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-21 13:59:29,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:29,423 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] [2022-11-21 13:59:29,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:29,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 13:59:29,629 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:29,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2022-11-21 13:59:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:29,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995936008] [2022-11-21 13:59:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:29,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:29,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:29,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 13:59:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:29,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:29,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:29,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995936008] [2022-11-21 13:59:29,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995936008] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:29,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349339979] [2022-11-21 13:59:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:29,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:29,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:29,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:29,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-21 13:59:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:29,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:59:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:29,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:30,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349339979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:30,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:30,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-11-21 13:59:30,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360868936] [2022-11-21 13:59:30,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-21 13:59:30,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:30,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-21 13:59:30,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:59:30,253 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) [2022-11-21 13:59:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:31,025 INFO L93 Difference]: Finished difference Result 1503 states and 2506 transitions. [2022-11-21 13:59:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-21 13:59:31,026 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 [2022-11-21 13:59:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:31,040 INFO L225 Difference]: With dead ends: 1503 [2022-11-21 13:59:31,040 INFO L226 Difference]: Without dead ends: 1501 [2022-11-21 13:59:31,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-11-21 13:59:31,044 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 [2022-11-21 13:59:31,044 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] [2022-11-21 13:59:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-11-21 13:59:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1258. [2022-11-21 13:59:31,227 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) [2022-11-21 13:59:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1844 transitions. [2022-11-21 13:59:31,241 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1844 transitions. Word has length 33 [2022-11-21 13:59:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:31,241 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1844 transitions. [2022-11-21 13:59:31,241 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) [2022-11-21 13:59:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1844 transitions. [2022-11-21 13:59:31,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-21 13:59:31,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:31,243 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] [2022-11-21 13:59:31,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:31,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-21 13:59:31,451 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:31,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:31,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1227703372, now seen corresponding path program 2 times [2022-11-21 13:59:31,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:31,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396768355] [2022-11-21 13:59:31,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:31,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:31,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 13:59:31,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396768355] [2022-11-21 13:59:31,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396768355] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969937498] [2022-11-21 13:59:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:59:31,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:31,687 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:31,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-21 13:59:31,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:59:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:59:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:59:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:31,847 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 13:59:31,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-21 13:59:32,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969937498] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:32,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:32,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-11-21 13:59:32,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426396787] [2022-11-21 13:59:32,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:32,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-21 13:59:32,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:32,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-21 13:59:32,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-21 13:59:32,128 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) [2022-11-21 13:59:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:33,147 INFO L93 Difference]: Finished difference Result 2355 states and 3821 transitions. [2022-11-21 13:59:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-21 13:59:33,148 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 [2022-11-21 13:59:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:33,175 INFO L225 Difference]: With dead ends: 2355 [2022-11-21 13:59:33,175 INFO L226 Difference]: Without dead ends: 2338 [2022-11-21 13:59:33,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1009, Unknown=0, NotChecked=0, Total=1332 [2022-11-21 13:59:33,179 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 235 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:33,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 161 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 13:59:33,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2338 states. [2022-11-21 13:59:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2338 to 1753. [2022-11-21 13:59:33,471 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) [2022-11-21 13:59:33,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2628 transitions. [2022-11-21 13:59:33,489 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2628 transitions. Word has length 36 [2022-11-21 13:59:33,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:33,489 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2628 transitions. [2022-11-21 13:59:33,489 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) [2022-11-21 13:59:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2628 transitions. [2022-11-21 13:59:33,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-21 13:59:33,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:33,491 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] [2022-11-21 13:59:33,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:33,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:33,698 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:33,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:33,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2022-11-21 13:59:33,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:33,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784574453] [2022-11-21 13:59:33,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:33,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:33,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:33,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 13:59:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:33,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:33,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784574453] [2022-11-21 13:59:33,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784574453] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:33,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635550270] [2022-11-21 13:59:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:33,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:33,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:33,884 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:33,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-21 13:59:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 13:59:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:34,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:34,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635550270] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:34,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:59:34,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 17 [2022-11-21 13:59:34,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879030623] [2022-11-21 13:59:34,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:59:34,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-21 13:59:34,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-21 13:59:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-11-21 13:59:34,301 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) [2022-11-21 13:59:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:34,834 INFO L93 Difference]: Finished difference Result 1910 states and 3114 transitions. [2022-11-21 13:59:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-21 13:59:34,835 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 [2022-11-21 13:59:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:34,850 INFO L225 Difference]: With dead ends: 1910 [2022-11-21 13:59:34,851 INFO L226 Difference]: Without dead ends: 1909 [2022-11-21 13:59:34,853 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 [2022-11-21 13:59:34,854 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 [2022-11-21 13:59:34,854 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] [2022-11-21 13:59:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2022-11-21 13:59:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 1734. [2022-11-21 13:59:35,091 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) [2022-11-21 13:59:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2480 transitions. [2022-11-21 13:59:35,105 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2480 transitions. Word has length 37 [2022-11-21 13:59:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:35,106 INFO L495 AbstractCegarLoop]: Abstraction has 1734 states and 2480 transitions. [2022-11-21 13:59:35,106 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) [2022-11-21 13:59:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2480 transitions. [2022-11-21 13:59:35,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-21 13:59:35,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:35,109 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] [2022-11-21 13:59:35,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:35,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-21 13:59:35,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2022-11-21 13:59:35,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:35,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109225221] [2022-11-21 13:59:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:35,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:35,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:35,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 13:59:35,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:35,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-11-21 13:59:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-21 13:59:35,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:35,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109225221] [2022-11-21 13:59:35,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109225221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:35,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013862190] [2022-11-21 13:59:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:35,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:35,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:35,423 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:35,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-21 13:59:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-21 13:59:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 13:59:35,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-21 13:59:35,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013862190] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:35,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:35,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-11-21 13:59:35,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027956467] [2022-11-21 13:59:35,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:35,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-21 13:59:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-21 13:59:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-11-21 13:59:35,835 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) [2022-11-21 13:59:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:36,171 INFO L93 Difference]: Finished difference Result 2467 states and 3685 transitions. [2022-11-21 13:59:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-21 13:59:36,173 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 [2022-11-21 13:59:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:36,179 INFO L225 Difference]: With dead ends: 2467 [2022-11-21 13:59:36,180 INFO L226 Difference]: Without dead ends: 869 [2022-11-21 13:59:36,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-11-21 13:59:36,194 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 [2022-11-21 13:59:36,195 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] [2022-11-21 13:59:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-11-21 13:59:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 850. [2022-11-21 13:59:36,300 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) [2022-11-21 13:59:36,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1115 transitions. [2022-11-21 13:59:36,306 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1115 transitions. Word has length 43 [2022-11-21 13:59:36,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:36,306 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1115 transitions. [2022-11-21 13:59:36,307 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) [2022-11-21 13:59:36,307 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1115 transitions. [2022-11-21 13:59:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-21 13:59:36,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:36,308 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:36,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:36,515 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:36,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:36,516 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 2 times [2022-11-21 13:59:36,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:36,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519588166] [2022-11-21 13:59:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:36,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:36,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519588166] [2022-11-21 13:59:36,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519588166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:36,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247885508] [2022-11-21 13:59:36,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:59:36,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:36,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:36,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:36,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-21 13:59:36,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:59:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:59:36,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 13:59:36,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:36,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247885508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:37,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-21 13:59:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873016049] [2022-11-21 13:59:37,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:59:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:59:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:59:37,121 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) [2022-11-21 13:59:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:37,973 INFO L93 Difference]: Finished difference Result 1623 states and 2347 transitions. [2022-11-21 13:59:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 13:59:37,974 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 [2022-11-21 13:59:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:37,985 INFO L225 Difference]: With dead ends: 1623 [2022-11-21 13:59:37,985 INFO L226 Difference]: Without dead ends: 1622 [2022-11-21 13:59:37,988 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 [2022-11-21 13:59:37,988 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 [2022-11-21 13:59:37,989 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] [2022-11-21 13:59:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2022-11-21 13:59:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1510. [2022-11-21 13:59:38,202 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) [2022-11-21 13:59:38,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1955 transitions. [2022-11-21 13:59:38,211 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1955 transitions. Word has length 44 [2022-11-21 13:59:38,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:38,211 INFO L495 AbstractCegarLoop]: Abstraction has 1510 states and 1955 transitions. [2022-11-21 13:59:38,212 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) [2022-11-21 13:59:38,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1955 transitions. [2022-11-21 13:59:38,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-21 13:59:38,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:38,215 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] [2022-11-21 13:59:38,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:38,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-21 13:59:38,422 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:38,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2022-11-21 13:59:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:38,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314117682] [2022-11-21 13:59:38,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:38,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:38,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:38,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 13:59:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:38,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:38,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314117682] [2022-11-21 13:59:38,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314117682] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:38,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883591151] [2022-11-21 13:59:38,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:59:38,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:38,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:38,641 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:38,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-21 13:59:38,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 13:59:38,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:59:38,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-21 13:59:38,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:38,797 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:38,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:39,127 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 13:59:39,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883591151] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:39,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:39,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-21 13:59:39,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274083911] [2022-11-21 13:59:39,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:39,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 13:59:39,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:39,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 13:59:39,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-11-21 13:59:39,130 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) [2022-11-21 13:59:40,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:40,809 INFO L93 Difference]: Finished difference Result 3056 states and 4731 transitions. [2022-11-21 13:59:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 13:59:40,810 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 [2022-11-21 13:59:40,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:40,827 INFO L225 Difference]: With dead ends: 3056 [2022-11-21 13:59:40,827 INFO L226 Difference]: Without dead ends: 2163 [2022-11-21 13:59:40,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=504, Invalid=1752, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 13:59:40,839 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 [2022-11-21 13:59:40,840 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] [2022-11-21 13:59:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-11-21 13:59:41,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1621. [2022-11-21 13:59:41,121 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) [2022-11-21 13:59:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2084 transitions. [2022-11-21 13:59:41,131 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2084 transitions. Word has length 45 [2022-11-21 13:59:41,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:41,131 INFO L495 AbstractCegarLoop]: Abstraction has 1621 states and 2084 transitions. [2022-11-21 13:59:41,132 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) [2022-11-21 13:59:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2084 transitions. [2022-11-21 13:59:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-21 13:59:41,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:41,134 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] [2022-11-21 13:59:41,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:41,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-21 13:59:41,346 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:41,346 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2022-11-21 13:59:41,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:41,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008467060] [2022-11-21 13:59:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:41,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:41,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:41,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 13:59:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:41,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 13:59:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 13:59:41,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:41,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008467060] [2022-11-21 13:59:41,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008467060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913443214] [2022-11-21 13:59:41,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:41,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:41,654 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:41,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-21 13:59:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:41,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:59:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 13:59:41,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:42,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913443214] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:42,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-21 13:59:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006964127] [2022-11-21 13:59:42,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 13:59:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 13:59:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:59:42,582 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) [2022-11-21 13:59:45,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:45,172 INFO L93 Difference]: Finished difference Result 4064 states and 7465 transitions. [2022-11-21 13:59:45,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-21 13:59:45,173 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 [2022-11-21 13:59:45,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:45,219 INFO L225 Difference]: With dead ends: 4064 [2022-11-21 13:59:45,219 INFO L226 Difference]: Without dead ends: 4060 [2022-11-21 13:59:45,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1680 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2022-11-21 13:59:45,226 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 167 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 13:59:45,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 244 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 13:59:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4060 states. [2022-11-21 13:59:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4060 to 2916. [2022-11-21 13:59:45,739 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) [2022-11-21 13:59:45,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 5949 transitions. [2022-11-21 13:59:45,768 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 5949 transitions. Word has length 52 [2022-11-21 13:59:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:45,768 INFO L495 AbstractCegarLoop]: Abstraction has 2916 states and 5949 transitions. [2022-11-21 13:59:45,769 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) [2022-11-21 13:59:45,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 5949 transitions. [2022-11-21 13:59:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-21 13:59:45,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:45,772 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:45,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:45,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:45,979 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:45,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 1 times [2022-11-21 13:59:45,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:45,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919185164] [2022-11-21 13:59:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:45,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:59:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:46,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919185164] [2022-11-21 13:59:46,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919185164] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:46,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478695438] [2022-11-21 13:59:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:46,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:46,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:46,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-21 13:59:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:46,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-21 13:59:46,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:59:46,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-21 13:59:46,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478695438] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:46,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:46,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-21 13:59:46,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73780187] [2022-11-21 13:59:46,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:46,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:59:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:59:46,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:59:46,699 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) [2022-11-21 13:59:48,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:48,691 INFO L93 Difference]: Finished difference Result 7961 states and 16550 transitions. [2022-11-21 13:59:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-21 13:59:48,692 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 [2022-11-21 13:59:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:48,786 INFO L225 Difference]: With dead ends: 7961 [2022-11-21 13:59:48,786 INFO L226 Difference]: Without dead ends: 7960 [2022-11-21 13:59:48,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 13:59:48,794 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 [2022-11-21 13:59:48,795 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] [2022-11-21 13:59:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7960 states. [2022-11-21 13:59:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7960 to 7884. [2022-11-21 13:59:50,029 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) [2022-11-21 13:59:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7884 states to 7884 states and 16119 transitions. [2022-11-21 13:59:50,105 INFO L78 Accepts]: Start accepts. Automaton has 7884 states and 16119 transitions. Word has length 58 [2022-11-21 13:59:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 13:59:50,106 INFO L495 AbstractCegarLoop]: Abstraction has 7884 states and 16119 transitions. [2022-11-21 13:59:50,106 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) [2022-11-21 13:59:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7884 states and 16119 transitions. [2022-11-21 13:59:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-21 13:59:50,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 13:59:50,109 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] [2022-11-21 13:59:50,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:50,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:50,316 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 13:59:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2022-11-21 13:59:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38313897] [2022-11-21 13:59:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:50,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:50,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 13:59:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:50,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 13:59:50,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:50,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 13:59:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:50,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 13:59:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:50,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:50,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38313897] [2022-11-21 13:59:50,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38313897] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:50,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059098361] [2022-11-21 13:59:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:50,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:50,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:50,651 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:50,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-21 13:59:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-21 13:59:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-21 13:59:50,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:51,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059098361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:51,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:51,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 26 [2022-11-21 13:59:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237437586] [2022-11-21 13:59:51,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:51,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 13:59:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:51,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 13:59:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:59:51,454 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) [2022-11-21 13:59:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 13:59:55,536 INFO L93 Difference]: Finished difference Result 27422 states and 98822 transitions. [2022-11-21 13:59:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-21 13:59:55,537 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 [2022-11-21 13:59:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 13:59:56,110 INFO L225 Difference]: With dead ends: 27422 [2022-11-21 13:59:56,110 INFO L226 Difference]: Without dead ends: 20893 [2022-11-21 13:59:56,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=906, Invalid=3516, Unknown=0, NotChecked=0, Total=4422 [2022-11-21 13:59:56,555 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 [2022-11-21 13:59:56,555 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] [2022-11-21 13:59:56,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20893 states. [2022-11-21 14:00:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20893 to 16604. [2022-11-21 14:00:00,764 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) [2022-11-21 14:00:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16604 states to 16604 states and 59949 transitions. [2022-11-21 14:00:01,204 INFO L78 Accepts]: Start accepts. Automaton has 16604 states and 59949 transitions. Word has length 56 [2022-11-21 14:00:01,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:01,205 INFO L495 AbstractCegarLoop]: Abstraction has 16604 states and 59949 transitions. [2022-11-21 14:00:01,206 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) [2022-11-21 14:00:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 16604 states and 59949 transitions. [2022-11-21 14:00:01,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-21 14:00:01,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:01,210 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:01,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:01,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:01,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:01,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2027008992, now seen corresponding path program 2 times [2022-11-21 14:00:01,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:01,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818634633] [2022-11-21 14:00:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:01,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:01,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-21 14:00:01,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:02,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:02,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:02,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:02,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:00:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 89 proven. 17 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-21 14:00:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:02,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818634633] [2022-11-21 14:00:02,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818634633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736479105] [2022-11-21 14:00:02,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:00:02,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:02,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:02,274 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:02,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-21 14:00:02,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:00:02,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-21 14:00:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:02,479 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 78 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-21 14:00:02,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 97 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-11-21 14:00:04,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736479105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:04,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:04,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 16] total 32 [2022-11-21 14:00:04,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366362348] [2022-11-21 14:00:04,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:04,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-21 14:00:04,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-21 14:00:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-21 14:00:04,004 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) [2022-11-21 14:00:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:06,902 INFO L93 Difference]: Finished difference Result 25458 states and 94365 transitions. [2022-11-21 14:00:06,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-21 14:00:06,906 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 81 [2022-11-21 14:00:06,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:06,994 INFO L225 Difference]: With dead ends: 25458 [2022-11-21 14:00:06,994 INFO L226 Difference]: Without dead ends: 10209 [2022-11-21 14:00:07,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=667, Invalid=2639, Unknown=0, NotChecked=0, Total=3306 [2022-11-21 14:00:07,379 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:07,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 308 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-21 14:00:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10209 states. [2022-11-21 14:00:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10209 to 9706. [2022-11-21 14:00:08,767 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) [2022-11-21 14:00:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 15639 transitions. [2022-11-21 14:00:08,832 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 15639 transitions. Word has length 81 [2022-11-21 14:00:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:08,833 INFO L495 AbstractCegarLoop]: Abstraction has 9706 states and 15639 transitions. [2022-11-21 14:00:08,833 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) [2022-11-21 14:00:08,833 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 15639 transitions. [2022-11-21 14:00:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-21 14:00:08,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:08,837 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] [2022-11-21 14:00:08,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:09,044 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:09,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:09,044 INFO L85 PathProgramCache]: Analyzing trace with hash -131434271, now seen corresponding path program 3 times [2022-11-21 14:00:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:09,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237831640] [2022-11-21 14:00:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:09,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 14:00:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:09,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:09,342 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 63 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 14:00:09,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:09,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237831640] [2022-11-21 14:00:09,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237831640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:09,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609538197] [2022-11-21 14:00:09,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 14:00:09,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:09,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:09,344 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:09,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-21 14:00:09,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-21 14:00:09,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:09,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-21 14:00:09,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 14:00:09,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 65 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 14:00:10,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609538197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:10,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:10,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 33 [2022-11-21 14:00:10,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178464233] [2022-11-21 14:00:10,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:10,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-21 14:00:10,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:10,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-21 14:00:10,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-21 14:00:10,129 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) [2022-11-21 14:00:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:12,287 INFO L93 Difference]: Finished difference Result 10357 states and 16637 transitions. [2022-11-21 14:00:12,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 14:00:12,287 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 [2022-11-21 14:00:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:12,340 INFO L225 Difference]: With dead ends: 10357 [2022-11-21 14:00:12,340 INFO L226 Difference]: Without dead ends: 10356 [2022-11-21 14:00:12,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=573, Invalid=1977, Unknown=0, NotChecked=0, Total=2550 [2022-11-21 14:00:12,347 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 203 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:12,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 263 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 14:00:12,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10356 states. [2022-11-21 14:00:13,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10356 to 9814. [2022-11-21 14:00:13,839 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) [2022-11-21 14:00:13,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9814 states to 9814 states and 15779 transitions. [2022-11-21 14:00:13,930 INFO L78 Accepts]: Start accepts. Automaton has 9814 states and 15779 transitions. Word has length 69 [2022-11-21 14:00:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:13,930 INFO L495 AbstractCegarLoop]: Abstraction has 9814 states and 15779 transitions. [2022-11-21 14:00:13,931 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) [2022-11-21 14:00:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 9814 states and 15779 transitions. [2022-11-21 14:00:13,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-21 14:00:13,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:13,942 INFO L195 NwaCegarLoop]: trace histogram [12, 8, 7, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:13,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:14,149 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:14,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:14,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1701452426, now seen corresponding path program 2 times [2022-11-21 14:00:14,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:14,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121423998] [2022-11-21 14:00:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:14,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-21 14:00:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:00:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-21 14:00:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 134 proven. 28 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-21 14:00:14,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:14,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121423998] [2022-11-21 14:00:14,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121423998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:14,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013432804] [2022-11-21 14:00:14,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:00:14,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:14,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:14,547 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:14,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-21 14:00:14,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:00:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:14,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-21 14:00:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-11-21 14:00:14,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 136 proven. 26 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-21 14:00:15,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013432804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:15,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:15,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 8] total 14 [2022-11-21 14:00:15,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743637476] [2022-11-21 14:00:15,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:15,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-21 14:00:15,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:15,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-21 14:00:15,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-21 14:00:15,328 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) [2022-11-21 14:00:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:16,820 INFO L93 Difference]: Finished difference Result 18932 states and 34355 transitions. [2022-11-21 14:00:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 14:00:16,821 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 104 [2022-11-21 14:00:16,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:16,892 INFO L225 Difference]: With dead ends: 18932 [2022-11-21 14:00:16,892 INFO L226 Difference]: Without dead ends: 10758 [2022-11-21 14:00:16,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 214 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-11-21 14:00:16,956 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:16,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 81 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 14:00:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10758 states. [2022-11-21 14:00:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10758 to 9808. [2022-11-21 14:00:18,408 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) [2022-11-21 14:00:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9808 states to 9808 states and 15693 transitions. [2022-11-21 14:00:18,456 INFO L78 Accepts]: Start accepts. Automaton has 9808 states and 15693 transitions. Word has length 104 [2022-11-21 14:00:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:18,457 INFO L495 AbstractCegarLoop]: Abstraction has 9808 states and 15693 transitions. [2022-11-21 14:00:18,458 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) [2022-11-21 14:00:18,458 INFO L276 IsEmpty]: Start isEmpty. Operand 9808 states and 15693 transitions. [2022-11-21 14:00:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-21 14:00:18,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:18,465 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] [2022-11-21 14:00:18,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:18,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-21 14:00:18,671 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1897499616, now seen corresponding path program 3 times [2022-11-21 14:00:18,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:18,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856796564] [2022-11-21 14:00:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:18,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 14:00:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:18,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:00:19,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 14:00:19,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-21 14:00:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 113 proven. 51 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2022-11-21 14:00:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:19,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856796564] [2022-11-21 14:00:19,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856796564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:19,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984828066] [2022-11-21 14:00:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 14:00:19,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:19,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:19,215 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:19,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-21 14:00:19,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-21 14:00:19,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-21 14:00:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 150 proven. 26 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-21 14:00:19,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 119 proven. 57 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-21 14:00:20,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984828066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:20,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:20,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 17 [2022-11-21 14:00:20,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678590695] [2022-11-21 14:00:20,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:20,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-21 14:00:20,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:20,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-21 14:00:20,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-21 14:00:20,573 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) [2022-11-21 14:00:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:22,472 INFO L93 Difference]: Finished difference Result 20497 states and 41620 transitions. [2022-11-21 14:00:22,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-21 14:00:22,475 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 [2022-11-21 14:00:22,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:22,563 INFO L225 Difference]: With dead ends: 20497 [2022-11-21 14:00:22,564 INFO L226 Difference]: Without dead ends: 12358 [2022-11-21 14:00:22,612 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 [2022-11-21 14:00:22,612 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 103 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:22,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 138 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 14:00:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12358 states. [2022-11-21 14:00:24,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12358 to 11997. [2022-11-21 14:00:24,027 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) [2022-11-21 14:00:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11997 states to 11997 states and 19076 transitions. [2022-11-21 14:00:24,086 INFO L78 Accepts]: Start accepts. Automaton has 11997 states and 19076 transitions. Word has length 99 [2022-11-21 14:00:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:24,086 INFO L495 AbstractCegarLoop]: Abstraction has 11997 states and 19076 transitions. [2022-11-21 14:00:24,086 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) [2022-11-21 14:00:24,086 INFO L276 IsEmpty]: Start isEmpty. Operand 11997 states and 19076 transitions. [2022-11-21 14:00:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-21 14:00:24,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:24,095 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] [2022-11-21 14:00:24,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:24,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:24,302 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash -127918165, now seen corresponding path program 3 times [2022-11-21 14:00:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:24,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073869990] [2022-11-21 14:00:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:24,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 14:00:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:24,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:24,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:00:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 122 proven. 90 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 14:00:24,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073869990] [2022-11-21 14:00:24,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073869990] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:24,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701221315] [2022-11-21 14:00:24,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 14:00:24,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:24,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:24,802 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:24,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-21 14:00:24,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-21 14:00:24,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-21 14:00:24,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 119 proven. 41 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-21 14:00:25,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 148 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-21 14:00:25,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701221315] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:25,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:25,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 8] total 29 [2022-11-21 14:00:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710215611] [2022-11-21 14:00:25,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:25,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 14:00:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 14:00:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-11-21 14:00:25,413 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) [2022-11-21 14:00:28,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:28,763 INFO L93 Difference]: Finished difference Result 20852 states and 35642 transitions. [2022-11-21 14:00:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 14:00:28,764 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 [2022-11-21 14:00:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:28,839 INFO L225 Difference]: With dead ends: 20852 [2022-11-21 14:00:28,839 INFO L226 Difference]: Without dead ends: 10359 [2022-11-21 14:00:28,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=983, Invalid=3439, Unknown=0, NotChecked=0, Total=4422 [2022-11-21 14:00:28,939 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 194 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:28,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 161 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-21 14:00:28,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10359 states. [2022-11-21 14:00:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10359 to 8741. [2022-11-21 14:00:30,075 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) [2022-11-21 14:00:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 12053 transitions. [2022-11-21 14:00:30,109 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 12053 transitions. Word has length 88 [2022-11-21 14:00:30,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:30,109 INFO L495 AbstractCegarLoop]: Abstraction has 8741 states and 12053 transitions. [2022-11-21 14:00:30,109 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) [2022-11-21 14:00:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 12053 transitions. [2022-11-21 14:00:30,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-21 14:00:30,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:30,115 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] [2022-11-21 14:00:30,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:30,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-21 14:00:30,322 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:30,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:30,322 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2022-11-21 14:00:30,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:30,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959101798] [2022-11-21 14:00:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:30,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:30,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 14:00:30,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:30,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:00:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:00:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:00:31,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-21 14:00:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-21 14:00:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-21 14:00:31,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959101798] [2022-11-21 14:00:31,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959101798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:31,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142776086] [2022-11-21 14:00:31,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-21 14:00:31,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:31,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:31,270 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:31,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-21 14:00:31,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-21 14:00:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-21 14:00:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-11-21 14:00:31,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-11-21 14:00:33,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142776086] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:33,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:33,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 23] total 42 [2022-11-21 14:00:33,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415455191] [2022-11-21 14:00:33,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:33,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-21 14:00:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-21 14:00:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2022-11-21 14:00:33,917 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) [2022-11-21 14:00:41,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:41,274 INFO L93 Difference]: Finished difference Result 29169 states and 46148 transitions. [2022-11-21 14:00:41,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-11-21 14:00:41,275 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 [2022-11-21 14:00:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:41,453 INFO L225 Difference]: With dead ends: 29169 [2022-11-21 14:00:41,454 INFO L226 Difference]: Without dead ends: 28067 [2022-11-21 14:00:41,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12130 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5454, Invalid=27126, Unknown=0, NotChecked=0, Total=32580 [2022-11-21 14:00:41,495 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 311 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:41,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 307 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-21 14:00:41,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28067 states. [2022-11-21 14:00:43,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28067 to 17311. [2022-11-21 14:00:43,679 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) [2022-11-21 14:00:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17311 states to 17311 states and 26931 transitions. [2022-11-21 14:00:43,761 INFO L78 Accepts]: Start accepts. Automaton has 17311 states and 26931 transitions. Word has length 90 [2022-11-21 14:00:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:43,761 INFO L495 AbstractCegarLoop]: Abstraction has 17311 states and 26931 transitions. [2022-11-21 14:00:43,762 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) [2022-11-21 14:00:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 17311 states and 26931 transitions. [2022-11-21 14:00:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-21 14:00:43,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:43,767 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:43,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:43,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-21 14:00:43,973 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:43,973 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 3 times [2022-11-21 14:00:43,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:43,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225148194] [2022-11-21 14:00:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:43,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:44,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225148194] [2022-11-21 14:00:44,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225148194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:44,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235645182] [2022-11-21 14:00:44,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-21 14:00:44,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:44,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:44,639 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:44,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-21 14:00:44,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-21 14:00:44,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:44,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-21 14:00:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:44,959 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:44,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235645182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:45,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:45,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-21 14:00:45,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315783016] [2022-11-21 14:00:45,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:45,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 14:00:45,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:45,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 14:00:45,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 14:00:45,696 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) [2022-11-21 14:00:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:00:50,563 INFO L93 Difference]: Finished difference Result 28628 states and 44547 transitions. [2022-11-21 14:00:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-21 14:00:50,564 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 [2022-11-21 14:00:50,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:00:50,727 INFO L225 Difference]: With dead ends: 28628 [2022-11-21 14:00:50,727 INFO L226 Difference]: Without dead ends: 28627 [2022-11-21 14:00:50,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-21 14:00:50,744 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 826 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-21 14:00:50,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 774 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-21 14:00:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28627 states. [2022-11-21 14:00:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28627 to 28627. [2022-11-21 14:00:54,162 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) [2022-11-21 14:00:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28627 states to 28627 states and 44535 transitions. [2022-11-21 14:00:54,288 INFO L78 Accepts]: Start accepts. Automaton has 28627 states and 44535 transitions. Word has length 92 [2022-11-21 14:00:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:00:54,289 INFO L495 AbstractCegarLoop]: Abstraction has 28627 states and 44535 transitions. [2022-11-21 14:00:54,289 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) [2022-11-21 14:00:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 28627 states and 44535 transitions. [2022-11-21 14:00:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-21 14:00:54,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:00:54,305 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:54,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-21 14:00:54,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-21 14:00:54,512 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:00:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:54,512 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 2 times [2022-11-21 14:00:54,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:54,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835992630] [2022-11-21 14:00:54,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:54,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-21 14:00:55,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835992630] [2022-11-21 14:00:55,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835992630] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:55,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212289962] [2022-11-21 14:00:55,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:00:55,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:55,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:55,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-21 14:00:55,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:00:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:55,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-21 14:00:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-21 14:00:55,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-21 14:00:56,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212289962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:56,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:56,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-21 14:00:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117603309] [2022-11-21 14:00:56,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:56,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-21 14:00:56,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-21 14:00:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-21 14:00:56,741 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) [2022-11-21 14:01:05,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:01:05,735 INFO L93 Difference]: Finished difference Result 64728 states and 101341 transitions. [2022-11-21 14:01:05,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-21 14:01:05,735 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 [2022-11-21 14:01:05,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:01:06,024 INFO L225 Difference]: With dead ends: 64728 [2022-11-21 14:01:06,024 INFO L226 Difference]: Without dead ends: 64727 [2022-11-21 14:01:06,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 277 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2534, Invalid=5656, Unknown=0, NotChecked=0, Total=8190 [2022-11-21 14:01:06,056 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1900 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1903 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-21 14:01:06,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1903 Valid, 540 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-21 14:01:06,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64727 states. [2022-11-21 14:01:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64727 to 64675. [2022-11-21 14:01:13,526 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) [2022-11-21 14:01:13,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64675 states to 64675 states and 101319 transitions. [2022-11-21 14:01:13,824 INFO L78 Accepts]: Start accepts. Automaton has 64675 states and 101319 transitions. Word has length 142 [2022-11-21 14:01:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 14:01:13,825 INFO L495 AbstractCegarLoop]: Abstraction has 64675 states and 101319 transitions. [2022-11-21 14:01:13,825 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) [2022-11-21 14:01:13,825 INFO L276 IsEmpty]: Start isEmpty. Operand 64675 states and 101319 transitions. [2022-11-21 14:01:13,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-21 14:01:13,846 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 14:01:13,846 INFO L195 NwaCegarLoop]: trace histogram [19, 17, 12, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-21 14:01:13,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-21 14:01:14,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-21 14:01:14,053 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2022-11-21 14:01:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:01:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash 109385931, now seen corresponding path program 1 times [2022-11-21 14:01:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:01:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078264011] [2022-11-21 14:01:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:14,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:01:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-21 14:01:14,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:01:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:01:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:01:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:01:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:01:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:01:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-11-21 14:01:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:01:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:01:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:01:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-21 14:01:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-21 14:01:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-21 14:01:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-21 14:01:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-11-21 14:01:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-11-21 14:01:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 368 proven. 224 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-11-21 14:01:15,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:01:15,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078264011] [2022-11-21 14:01:15,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078264011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:01:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416758809] [2022-11-21 14:01:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:01:15,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:01:15,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:01:15,488 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:01:15,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62c81860-94c9-4187-bad1-1e8a06b3481b/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-21 14:01:15,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:01:15,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-21 14:01:15,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:01:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 357 proven. 216 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2022-11-21 14:01:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:01:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 929 backedges. 373 proven. 263 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-11-21 14:01:19,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416758809] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:01:19,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:01:19,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2022-11-21 14:01:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628729904] [2022-11-21 14:01:19,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:01:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-21 14:01:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:01:19,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-21 14:01:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-11-21 14:01:19,362 INFO L87 Difference]: Start difference. First operand 64675 states and 101319 transitions. Second operand has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 25 states have internal predecessors, (124), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) [2022-11-21 14:01:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 14:01:31,518 INFO L93 Difference]: Finished difference Result 152847 states and 310280 transitions. [2022-11-21 14:01:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-21 14:01:31,519 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.428571428571429) internal successors, (124), 25 states have internal predecessors, (124), 16 states have call successors, (18), 2 states have call predecessors, (18), 14 states have return successors, (29), 12 states have call predecessors, (29), 15 states have call successors, (29) Word has length 177 [2022-11-21 14:01:31,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 14:01:32,745 INFO L225 Difference]: With dead ends: 152847 [2022-11-21 14:01:32,745 INFO L226 Difference]: Without dead ends: 94875 [2022-11-21 14:01:33,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 372 SyntacticMatches, 15 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=446, Invalid=1624, Unknown=0, NotChecked=0, Total=2070 [2022-11-21 14:01:33,152 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 186 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-21 14:01:33,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 282 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-21 14:01:33,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94875 states.