./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:02:36,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:02:36,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:02:36,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:02:36,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:02:36,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:02:36,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:02:36,153 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:02:36,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:02:36,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:02:36,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:02:36,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:02:36,168 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:02:36,171 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:02:36,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:02:36,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:02:36,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:02:36,183 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:02:36,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:02:36,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:02:36,196 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:02:36,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:02:36,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:02:36,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:02:36,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:02:36,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:02:36,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:02:36,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:02:36,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:02:36,213 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:02:36,213 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:02:36,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:02:36,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:02:36,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:02:36,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:02:36,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:02:36,221 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:02:36,221 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:02:36,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:02:36,222 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:02:36,223 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:02:36,224 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-11-07 08:02:36,274 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:02:36,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:02:36,275 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:02:36,275 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:02:36,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:02:36,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:02:36,283 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:02:36,284 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:02:36,284 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:02:36,284 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 08:02:36,285 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:02:36,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:02:36,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:02:36,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:02:36,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:02:36,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:02:36,287 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-07 08:02:36,287 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:02:36,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:02:36,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:02:36,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:02:36,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:02:36,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:02:36,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:02:36,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:02:36,289 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:02:36,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:02:36,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:02:36,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:02:36,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:02:36,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:02:36,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:02:36,293 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_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2021-11-07 08:02:36,580 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:02:36,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:02:36,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:02:36,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:02:36,622 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:02:36,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2021-11-07 08:02:36,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/data/18b781eb2/632c642b51ce419bb94eb0f6f31e936b/FLAG8b4eee767 [2021-11-07 08:02:37,263 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:02:37,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/sv-benchmarks/c/recursive/Ackermann01-2.c [2021-11-07 08:02:37,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/data/18b781eb2/632c642b51ce419bb94eb0f6f31e936b/FLAG8b4eee767 [2021-11-07 08:02:37,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/data/18b781eb2/632c642b51ce419bb94eb0f6f31e936b [2021-11-07 08:02:37,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:02:37,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:02:37,640 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:02:37,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:02:37,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:02:37,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4be9a1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37, skipping insertion in model container [2021-11-07 08:02:37,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:02:37,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:02:37,853 WARN L228 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_5fcdf252-db3a-46b4-838a-164c6b5082a8/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2021-11-07 08:02:37,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:02:37,869 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:02:37,883 WARN L228 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_5fcdf252-db3a-46b4-838a-164c6b5082a8/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2021-11-07 08:02:37,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:02:37,897 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:02:37,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37 WrapperNode [2021-11-07 08:02:37,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:02:37,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:02:37,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:02:37,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:02:37,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:02:37,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:02:37,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:02:37,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:02:37,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,945 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:02:37,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:02:37,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:02:37,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:02:37,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (1/1) ... [2021-11-07 08:02:37,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:02:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:37,981 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:02:37,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:02:38,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:02:38,027 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2021-11-07 08:02:38,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2021-11-07 08:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:02:38,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:02:38,250 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:02:38,250 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-07 08:02:38,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:02:38 BoogieIcfgContainer [2021-11-07 08:02:38,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:02:38,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:02:38,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:02:38,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:02:38,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:02:37" (1/3) ... [2021-11-07 08:02:38,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12181409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:02:38, skipping insertion in model container [2021-11-07 08:02:38,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:02:37" (2/3) ... [2021-11-07 08:02:38,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12181409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:02:38, skipping insertion in model container [2021-11-07 08:02:38,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:02:38" (3/3) ... [2021-11-07 08:02:38,261 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2021-11-07 08:02:38,267 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:02:38,268 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-07 08:02:38,315 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:02:38,322 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 08:02:38,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-07 08:02:38,341 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) [2021-11-07 08:02:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 08:02:38,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:38,346 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:38,347 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:38,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:38,353 INFO L85 PathProgramCache]: Analyzing trace with hash 180762217, now seen corresponding path program 1 times [2021-11-07 08:02:38,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:38,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949714324] [2021-11-07 08:02:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:38,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:38,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:38,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949714324] [2021-11-07 08:02:38,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949714324] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:38,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:38,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:02:38,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411690448] [2021-11-07 08:02:38,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:38,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:38,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:38,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:02:38,602 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) [2021-11-07 08:02:38,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:38,784 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-11-07 08:02:38,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:02:38,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-07 08:02:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:38,796 INFO L225 Difference]: With dead ends: 73 [2021-11-07 08:02:38,797 INFO L226 Difference]: Without dead ends: 59 [2021-11-07 08:02:38,799 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:02:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-07 08:02:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2021-11-07 08:02:38,854 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) [2021-11-07 08:02:38,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2021-11-07 08:02:38,867 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 8 [2021-11-07 08:02:38,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:38,867 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2021-11-07 08:02:38,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:38,868 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2021-11-07 08:02:38,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:02:38,870 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:38,870 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:38,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:02:38,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1308666490, now seen corresponding path program 1 times [2021-11-07 08:02:38,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:38,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8920589] [2021-11-07 08:02:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:38,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:38,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:38,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8920589] [2021-11-07 08:02:38,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8920589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:38,998 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:38,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:02:38,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530307079] [2021-11-07 08:02:39,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:39,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:39,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:39,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:02:39,002 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) [2021-11-07 08:02:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:39,065 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2021-11-07 08:02:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:02:39,066 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 [2021-11-07 08:02:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:39,067 INFO L225 Difference]: With dead ends: 51 [2021-11-07 08:02:39,067 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 08:02:39,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:02:39,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 08:02:39,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-11-07 08:02:39,076 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) [2021-11-07 08:02:39,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2021-11-07 08:02:39,078 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 9 [2021-11-07 08:02:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:39,079 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2021-11-07 08:02:39,079 INFO L471 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) [2021-11-07 08:02:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2021-11-07 08:02:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-07 08:02:39,080 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:39,080 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:39,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:02:39,081 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:39,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:39,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1308661493, now seen corresponding path program 1 times [2021-11-07 08:02:39,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:39,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385529309] [2021-11-07 08:02:39,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:39,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:39,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:39,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385529309] [2021-11-07 08:02:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385529309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:39,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:02:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033265459] [2021-11-07 08:02:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:39,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:39,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:39,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:02:39,151 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) 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) [2021-11-07 08:02:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:39,272 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-07 08:02:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:02:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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 [2021-11-07 08:02:39,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:39,287 INFO L225 Difference]: With dead ends: 76 [2021-11-07 08:02:39,287 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 08:02:39,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:02:39,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 08:02:39,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-11-07 08:02:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 55 states have internal predecessors, (67), 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) [2021-11-07 08:02:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-11-07 08:02:39,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 9 [2021-11-07 08:02:39,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:39,302 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-11-07 08:02:39,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) 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) [2021-11-07 08:02:39,303 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-11-07 08:02:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 08:02:39,304 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:39,304 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:39,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:02:39,305 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:39,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1913955596, now seen corresponding path program 1 times [2021-11-07 08:02:39,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:39,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877475866] [2021-11-07 08:02:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:39,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:39,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:39,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:39,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:39,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877475866] [2021-11-07 08:02:39,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877475866] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:39,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:39,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:02:39,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862977288] [2021-11-07 08:02:39,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:39,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:39,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:39,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:02:39,381 INFO L87 Difference]: Start difference. First operand 68 states and 86 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) [2021-11-07 08:02:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:39,483 INFO L93 Difference]: Finished difference Result 116 states and 154 transitions. [2021-11-07 08:02:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:02:39,484 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 [2021-11-07 08:02:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:39,487 INFO L225 Difference]: With dead ends: 116 [2021-11-07 08:02:39,490 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 08:02:39,490 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:02:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 08:02:39,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-11-07 08:02:39,521 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) [2021-11-07 08:02:39,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2021-11-07 08:02:39,527 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 10 [2021-11-07 08:02:39,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:39,527 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2021-11-07 08:02:39,528 INFO L471 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) [2021-11-07 08:02:39,529 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2021-11-07 08:02:39,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:02:39,530 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:39,530 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:39,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:02:39,533 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:39,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:39,536 INFO L85 PathProgramCache]: Analyzing trace with hash 219392943, now seen corresponding path program 1 times [2021-11-07 08:02:39,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:39,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674282763] [2021-11-07 08:02:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:39,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:39,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:39,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674282763] [2021-11-07 08:02:39,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674282763] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:39,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:02:39,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-07 08:02:39,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584661728] [2021-11-07 08:02:39,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 08:02:39,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:39,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 08:02:39,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 08:02:39,617 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) [2021-11-07 08:02:39,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:39,692 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2021-11-07 08:02:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:02:39,692 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 [2021-11-07 08:02:39,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:39,697 INFO L225 Difference]: With dead ends: 168 [2021-11-07 08:02:39,698 INFO L226 Difference]: Without dead ends: 97 [2021-11-07 08:02:39,704 INFO L786 BasicCegarLoop]: 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 [2021-11-07 08:02:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-07 08:02:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-11-07 08:02:39,726 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) [2021-11-07 08:02:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-11-07 08:02:39,728 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 16 [2021-11-07 08:02:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:39,729 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-11-07 08:02:39,730 INFO L471 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) [2021-11-07 08:02:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-11-07 08:02:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 08:02:39,731 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:39,732 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:39,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:02:39,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:39,733 INFO L85 PathProgramCache]: Analyzing trace with hash 219399894, now seen corresponding path program 1 times [2021-11-07 08:02:39,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:39,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180717447] [2021-11-07 08:02:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:39,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:39,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:39,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:39,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180717447] [2021-11-07 08:02:39,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180717447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:39,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006656187] [2021-11-07 08:02:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:39,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:39,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:39,840 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:39,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:02:39,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:39,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:02:39,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:39,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006656187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:39,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:39,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-07 08:02:39,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332979635] [2021-11-07 08:02:39,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:02:39,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:02:39,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:02:39,988 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-07 08:02:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:40,111 INFO L93 Difference]: Finished difference Result 169 states and 217 transitions. [2021-11-07 08:02:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:02:40,111 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 16 [2021-11-07 08:02:40,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:40,114 INFO L225 Difference]: With dead ends: 169 [2021-11-07 08:02:40,114 INFO L226 Difference]: Without dead ends: 167 [2021-11-07 08:02:40,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:02:40,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-07 08:02:40,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2021-11-07 08:02:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 113 states have (on average 1.2831858407079646) internal successors, (145), 120 states have internal predecessors, (145), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-07 08:02:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2021-11-07 08:02:40,135 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 16 [2021-11-07 08:02:40,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:40,135 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2021-11-07 08:02:40,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2021-11-07 08:02:40,135 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2021-11-07 08:02:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:02:40,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:40,137 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:40,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:40,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:40,357 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:40,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1162887243, now seen corresponding path program 1 times [2021-11-07 08:02:40,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:40,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502405235] [2021-11-07 08:02:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:40,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:40,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:40,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502405235] [2021-11-07 08:02:40,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502405235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:40,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375139816] [2021-11-07 08:02:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:40,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:40,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:40,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:40,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:02:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:02:40,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:40,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375139816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:40,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:02:40,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-07 08:02:40,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015992959] [2021-11-07 08:02:40,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:40,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:02:40,572 INFO L87 Difference]: Start difference. First operand 149 states and 188 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) [2021-11-07 08:02:40,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:40,664 INFO L93 Difference]: Finished difference Result 211 states and 279 transitions. [2021-11-07 08:02:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:02:40,664 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 [2021-11-07 08:02:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:40,667 INFO L225 Difference]: With dead ends: 211 [2021-11-07 08:02:40,668 INFO L226 Difference]: Without dead ends: 210 [2021-11-07 08:02:40,668 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:02:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-07 08:02:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 187. [2021-11-07 08:02:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 150 states have internal predecessors, (184), 29 states have call successors, (29), 10 states have call predecessors, (29), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-07 08:02:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 239 transitions. [2021-11-07 08:02:40,690 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 239 transitions. Word has length 17 [2021-11-07 08:02:40,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:40,690 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 239 transitions. [2021-11-07 08:02:40,691 INFO L471 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) [2021-11-07 08:02:40,691 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 239 transitions. [2021-11-07 08:02:40,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 08:02:40,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:40,692 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:40,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:40,913 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash 523262015, now seen corresponding path program 1 times [2021-11-07 08:02:40,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:40,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221762360] [2021-11-07 08:02:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:40,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:40,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:40,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221762360] [2021-11-07 08:02:40,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221762360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:40,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786918792] [2021-11-07 08:02:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:40,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:40,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:40,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:40,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:02:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:02:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:41,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786918792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:41,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:41,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-07 08:02:41,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890556479] [2021-11-07 08:02:41,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:02:41,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:41,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:02:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:02:41,100 INFO L87 Difference]: Start difference. First operand 187 states and 239 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-11-07 08:02:41,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:41,204 INFO L93 Difference]: Finished difference Result 268 states and 348 transitions. [2021-11-07 08:02:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:02:41,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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 20 [2021-11-07 08:02:41,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:41,207 INFO L225 Difference]: With dead ends: 268 [2021-11-07 08:02:41,208 INFO L226 Difference]: Without dead ends: 267 [2021-11-07 08:02:41,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:02:41,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-07 08:02:41,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 244. [2021-11-07 08:02:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 188 states have (on average 1.2606382978723405) internal successors, (237), 195 states have internal predecessors, (237), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-07 08:02:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 310 transitions. [2021-11-07 08:02:41,228 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 310 transitions. Word has length 20 [2021-11-07 08:02:41,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:41,229 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 310 transitions. [2021-11-07 08:02:41,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 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) [2021-11-07 08:02:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 310 transitions. [2021-11-07 08:02:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 08:02:41,230 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:41,230 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:41,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:41,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-07 08:02:41,444 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:41,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1106403678, now seen corresponding path program 1 times [2021-11-07 08:02:41,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:41,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538732709] [2021-11-07 08:02:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:41,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:41,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:02:41,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:41,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538732709] [2021-11-07 08:02:41,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538732709] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:41,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136266306] [2021-11-07 08:02:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:41,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:41,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:41,526 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:41,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:02:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:41,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:02:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:02:41,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136266306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:41,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:41,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 08:02:41,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310076217] [2021-11-07 08:02:41,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:02:41,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:41,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:02:41,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:02:41,729 INFO L87 Difference]: Start difference. First operand 244 states and 310 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-11-07 08:02:41,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:41,956 INFO L93 Difference]: Finished difference Result 381 states and 543 transitions. [2021-11-07 08:02:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:02:41,957 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 24 [2021-11-07 08:02:41,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:41,962 INFO L225 Difference]: With dead ends: 381 [2021-11-07 08:02:41,962 INFO L226 Difference]: Without dead ends: 379 [2021-11-07 08:02:41,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:02:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-07 08:02:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 350. [2021-11-07 08:02:42,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 259 states have (on average 1.250965250965251) internal successors, (324), 276 states have internal predecessors, (324), 59 states have call successors, (59), 17 states have call predecessors, (59), 26 states have return successors, (100), 56 states have call predecessors, (100), 55 states have call successors, (100) [2021-11-07 08:02:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 483 transitions. [2021-11-07 08:02:42,014 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 483 transitions. Word has length 24 [2021-11-07 08:02:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:42,016 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 483 transitions. [2021-11-07 08:02:42,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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) [2021-11-07 08:02:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 483 transitions. [2021-11-07 08:02:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:02:42,022 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:42,022 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:42,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:42,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:42,237 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:42,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash -61224288, now seen corresponding path program 1 times [2021-11-07 08:02:42,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:42,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174574496] [2021-11-07 08:02:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:42,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:42,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:02:42,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:42,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174574496] [2021-11-07 08:02:42,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174574496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:42,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521902358] [2021-11-07 08:02:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:42,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:42,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:42,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:02:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:42,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:02:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:02:42,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521902358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:02:42,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:02:42,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-07 08:02:42,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993644105] [2021-11-07 08:02:42,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:02:42,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:02:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:02:42,510 INFO L87 Difference]: Start difference. First operand 350 states and 483 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) [2021-11-07 08:02:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:42,612 INFO L93 Difference]: Finished difference Result 359 states and 489 transitions. [2021-11-07 08:02:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:02:42,613 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 [2021-11-07 08:02:42,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:42,617 INFO L225 Difference]: With dead ends: 359 [2021-11-07 08:02:42,617 INFO L226 Difference]: Without dead ends: 358 [2021-11-07 08:02:42,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:02:42,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-07 08:02:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 349. [2021-11-07 08:02:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 259 states have (on average 1.2355212355212355) internal successors, (320), 275 states have internal predecessors, (320), 59 states have call successors, (59), 17 states have call predecessors, (59), 26 states have return successors, (100), 56 states have call predecessors, (100), 55 states have call successors, (100) [2021-11-07 08:02:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 479 transitions. [2021-11-07 08:02:42,647 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 479 transitions. Word has length 25 [2021-11-07 08:02:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:42,647 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 479 transitions. [2021-11-07 08:02:42,648 INFO L471 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) [2021-11-07 08:02:42,648 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 479 transitions. [2021-11-07 08:02:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:02:42,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:42,650 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:42,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:42,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:02:42,865 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:42,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:42,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1403347671, now seen corresponding path program 2 times [2021-11-07 08:02:42,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:42,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091649233] [2021-11-07 08:02:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:42,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:42,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:42,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091649233] [2021-11-07 08:02:42,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091649233] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:42,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619165463] [2021-11-07 08:02:42,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:02:42,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:42,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:42,948 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:42,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:02:43,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:02:43,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:43,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:02:43,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:43,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619165463] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:43,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:43,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-11-07 08:02:43,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374919780] [2021-11-07 08:02:43,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:02:43,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:43,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:02:43,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:02:43,118 INFO L87 Difference]: Start difference. First operand 349 states and 479 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:43,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:43,285 INFO L93 Difference]: Finished difference Result 450 states and 618 transitions. [2021-11-07 08:02:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:02:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-07 08:02:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:43,289 INFO L225 Difference]: With dead ends: 450 [2021-11-07 08:02:43,290 INFO L226 Difference]: Without dead ends: 449 [2021-11-07 08:02:43,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:02:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-11-07 08:02:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 422. [2021-11-07 08:02:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 312 states have (on average 1.2211538461538463) internal successors, (381), 333 states have internal predecessors, (381), 71 states have call successors, (71), 20 states have call predecessors, (71), 34 states have return successors, (125), 68 states have call predecessors, (125), 67 states have call successors, (125) [2021-11-07 08:02:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 577 transitions. [2021-11-07 08:02:43,333 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 577 transitions. Word has length 28 [2021-11-07 08:02:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:43,334 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 577 transitions. [2021-11-07 08:02:43,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 577 transitions. [2021-11-07 08:02:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 08:02:43,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:43,336 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:43,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:43,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:02:43,545 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1583952330, now seen corresponding path program 1 times [2021-11-07 08:02:43,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:43,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097969151] [2021-11-07 08:02:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:43,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:43,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:02:43,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:43,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097969151] [2021-11-07 08:02:43,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097969151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:43,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596394292] [2021-11-07 08:02:43,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:43,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:43,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:43,623 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:43,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:02:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:02:43,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:02:43,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596394292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:43,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:43,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-07 08:02:43,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748636172] [2021-11-07 08:02:43,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 08:02:43,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:43,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 08:02:43,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-07 08:02:43,859 INFO L87 Difference]: Start difference. First operand 422 states and 577 transitions. Second operand has 12 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:02:44,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:44,256 INFO L93 Difference]: Finished difference Result 667 states and 1010 transitions. [2021-11-07 08:02:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:02:44,257 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-07 08:02:44,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:44,267 INFO L225 Difference]: With dead ends: 667 [2021-11-07 08:02:44,267 INFO L226 Difference]: Without dead ends: 662 [2021-11-07 08:02:44,268 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:02:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-11-07 08:02:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 503. [2021-11-07 08:02:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 374 states have (on average 1.2165775401069518) internal successors, (455), 399 states have internal predecessors, (455), 81 states have call successors, (81), 25 states have call predecessors, (81), 43 states have return successors, (187), 78 states have call predecessors, (187), 76 states have call successors, (187) [2021-11-07 08:02:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 723 transitions. [2021-11-07 08:02:44,340 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 723 transitions. Word has length 28 [2021-11-07 08:02:44,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:44,342 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 723 transitions. [2021-11-07 08:02:44,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 6 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:02:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 723 transitions. [2021-11-07 08:02:44,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 08:02:44,345 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:44,346 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:44,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:44,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 08:02:44,557 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash -417710557, now seen corresponding path program 1 times [2021-11-07 08:02:44,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:44,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249410812] [2021-11-07 08:02:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:44,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:02:44,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:44,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249410812] [2021-11-07 08:02:44,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249410812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:44,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80411956] [2021-11-07 08:02:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:44,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:44,628 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:44,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:02:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:02:44,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:44,853 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:02:44,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80411956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:44,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:44,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-11-07 08:02:44,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393016917] [2021-11-07 08:02:44,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 08:02:44,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 08:02:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:02:44,855 INFO L87 Difference]: Start difference. First operand 503 states and 723 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:45,047 INFO L93 Difference]: Finished difference Result 744 states and 1101 transitions. [2021-11-07 08:02:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:02:45,048 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 3 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 30 [2021-11-07 08:02:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:45,054 INFO L225 Difference]: With dead ends: 744 [2021-11-07 08:02:45,054 INFO L226 Difference]: Without dead ends: 742 [2021-11-07 08:02:45,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:02:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-11-07 08:02:45,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 721. [2021-11-07 08:02:45,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 538 states have (on average 1.20817843866171) internal successors, (650), 572 states have internal predecessors, (650), 114 states have call successors, (114), 36 states have call predecessors, (114), 64 states have return successors, (275), 112 states have call predecessors, (275), 109 states have call successors, (275) [2021-11-07 08:02:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1039 transitions. [2021-11-07 08:02:45,114 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1039 transitions. Word has length 30 [2021-11-07 08:02:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:45,115 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1039 transitions. [2021-11-07 08:02:45,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 6 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1039 transitions. [2021-11-07 08:02:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-07 08:02:45,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:45,117 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:02:45,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:45,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-07 08:02:45,333 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:45,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1777813581, now seen corresponding path program 1 times [2021-11-07 08:02:45,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:45,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656409411] [2021-11-07 08:02:45,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:45,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:45,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:45,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:45,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656409411] [2021-11-07 08:02:45,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656409411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:45,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885298383] [2021-11-07 08:02:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:45,414 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:45,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:45,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:45,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:02:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:02:45,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:45,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:45,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885298383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:45,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:45,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 08:02:45,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788678679] [2021-11-07 08:02:45,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:02:45,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:45,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:02:45,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:02:45,663 INFO L87 Difference]: Start difference. First operand 721 states and 1039 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:02:46,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:46,124 INFO L93 Difference]: Finished difference Result 1201 states and 1965 transitions. [2021-11-07 08:02:46,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:02:46,124 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2021-11-07 08:02:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:46,135 INFO L225 Difference]: With dead ends: 1201 [2021-11-07 08:02:46,135 INFO L226 Difference]: Without dead ends: 1191 [2021-11-07 08:02:46,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:02:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-11-07 08:02:46,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 1094. [2021-11-07 08:02:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 801 states have (on average 1.1960049937578028) internal successors, (958), 845 states have internal predecessors, (958), 185 states have call successors, (185), 52 states have call predecessors, (185), 103 states have return successors, (534), 196 states have call predecessors, (534), 178 states have call successors, (534) [2021-11-07 08:02:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1677 transitions. [2021-11-07 08:02:46,236 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1677 transitions. Word has length 33 [2021-11-07 08:02:46,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:46,236 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1677 transitions. [2021-11-07 08:02:46,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:02:46,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1677 transitions. [2021-11-07 08:02:46,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 08:02:46,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:46,238 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:46,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:46,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:02:46,453 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:46,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:46,453 INFO L85 PathProgramCache]: Analyzing trace with hash 596531219, now seen corresponding path program 3 times [2021-11-07 08:02:46,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:46,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956024893] [2021-11-07 08:02:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:46,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:46,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:46,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956024893] [2021-11-07 08:02:46,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956024893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:46,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715654520] [2021-11-07 08:02:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:02:46,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:46,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:46,559 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:46,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:02:46,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:02:46,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:46,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:02:46,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:46,798 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:46,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715654520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:46,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:46,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-11-07 08:02:46,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587256493] [2021-11-07 08:02:46,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:02:46,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:46,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:02:46,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:02:46,800 INFO L87 Difference]: Start difference. First operand 1094 states and 1677 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:47,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:47,034 INFO L93 Difference]: Finished difference Result 1246 states and 1880 transitions. [2021-11-07 08:02:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:02:47,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 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 36 [2021-11-07 08:02:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:47,044 INFO L225 Difference]: With dead ends: 1246 [2021-11-07 08:02:47,044 INFO L226 Difference]: Without dead ends: 1245 [2021-11-07 08:02:47,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:02:47,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-11-07 08:02:47,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1206. [2021-11-07 08:02:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 881 states have (on average 1.1895573212258796) internal successors, (1048), 929 states have internal predecessors, (1048), 205 states have call successors, (205), 56 states have call predecessors, (205), 115 states have return successors, (587), 220 states have call predecessors, (587), 198 states have call successors, (587) [2021-11-07 08:02:47,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1840 transitions. [2021-11-07 08:02:47,141 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1840 transitions. Word has length 36 [2021-11-07 08:02:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:47,141 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 1840 transitions. [2021-11-07 08:02:47,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:47,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1840 transitions. [2021-11-07 08:02:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 08:02:47,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:47,143 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:47,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:47,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:02:47,369 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:47,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1595979986, now seen corresponding path program 1 times [2021-11-07 08:02:47,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:47,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150929531] [2021-11-07 08:02:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:47,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:47,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-07 08:02:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:47,444 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:02:47,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:47,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150929531] [2021-11-07 08:02:47,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150929531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:47,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724802289] [2021-11-07 08:02:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:47,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:47,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:47,446 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:47,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:02:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:02:47,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:02:47,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724802289] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:47,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:47,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-11-07 08:02:47,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35856321] [2021-11-07 08:02:47,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:02:47,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:47,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:02:47,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:02:47,711 INFO L87 Difference]: Start difference. First operand 1206 states and 1840 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:02:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:48,002 INFO L93 Difference]: Finished difference Result 1988 states and 3425 transitions. [2021-11-07 08:02:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:02:48,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-11-07 08:02:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:48,018 INFO L225 Difference]: With dead ends: 1988 [2021-11-07 08:02:48,018 INFO L226 Difference]: Without dead ends: 1241 [2021-11-07 08:02:48,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:02:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-11-07 08:02:48,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1196. [2021-11-07 08:02:48,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1196 states, 875 states have (on average 1.1885714285714286) internal successors, (1040), 921 states have internal predecessors, (1040), 205 states have call successors, (205), 56 states have call predecessors, (205), 111 states have return successors, (555), 218 states have call predecessors, (555), 198 states have call successors, (555) [2021-11-07 08:02:48,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1800 transitions. [2021-11-07 08:02:48,132 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1800 transitions. Word has length 38 [2021-11-07 08:02:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:48,132 INFO L470 AbstractCegarLoop]: Abstraction has 1196 states and 1800 transitions. [2021-11-07 08:02:48,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 5 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-07 08:02:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1800 transitions. [2021-11-07 08:02:48,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:02:48,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:48,134 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:02:48,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:48,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:02:48,353 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:48,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:48,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1699542727, now seen corresponding path program 1 times [2021-11-07 08:02:48,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:48,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520595238] [2021-11-07 08:02:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:48,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:48,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:48,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:48,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:48,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520595238] [2021-11-07 08:02:48,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520595238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:48,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975640518] [2021-11-07 08:02:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:48,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:48,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:48,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:48,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:02:48,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:48,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:02:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:48,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:48,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975640518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:48,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:48,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-07 08:02:48,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275627129] [2021-11-07 08:02:48,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:02:48,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:48,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:02:48,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:02:48,745 INFO L87 Difference]: Start difference. First operand 1196 states and 1800 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:02:49,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:49,115 INFO L93 Difference]: Finished difference Result 2048 states and 3473 transitions. [2021-11-07 08:02:49,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:02:49,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-11-07 08:02:49,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:49,127 INFO L225 Difference]: With dead ends: 2048 [2021-11-07 08:02:49,128 INFO L226 Difference]: Without dead ends: 1311 [2021-11-07 08:02:49,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:02:49,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-11-07 08:02:49,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1224. [2021-11-07 08:02:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 893 states have (on average 1.1802911534154534) internal successors, (1054), 939 states have internal predecessors, (1054), 213 states have call successors, (213), 58 states have call predecessors, (213), 113 states have return successors, (528), 226 states have call predecessors, (528), 206 states have call successors, (528) [2021-11-07 08:02:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 1795 transitions. [2021-11-07 08:02:49,228 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 1795 transitions. Word has length 37 [2021-11-07 08:02:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:49,228 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 1795 transitions. [2021-11-07 08:02:49,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:02:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 1795 transitions. [2021-11-07 08:02:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:02:49,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:49,231 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:49,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:49,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:02:49,448 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:49,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1006409040, now seen corresponding path program 2 times [2021-11-07 08:02:49,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:49,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185935328] [2021-11-07 08:02:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:49,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:02:49,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185935328] [2021-11-07 08:02:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185935328] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211053405] [2021-11-07 08:02:49,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:02:49,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:49,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:49,558 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:49,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:02:49,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:02:49,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:49,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:02:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 08:02:49,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211053405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:49,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:49,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-11-07 08:02:49,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277323816] [2021-11-07 08:02:49,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:02:49,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:49,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:02:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:02:49,848 INFO L87 Difference]: Start difference. First operand 1224 states and 1795 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:50,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:50,098 INFO L93 Difference]: Finished difference Result 1667 states and 2478 transitions. [2021-11-07 08:02:50,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:02:50,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:02:50,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:50,115 INFO L225 Difference]: With dead ends: 1667 [2021-11-07 08:02:50,115 INFO L226 Difference]: Without dead ends: 1665 [2021-11-07 08:02:50,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:02:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-11-07 08:02:50,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1623. [2021-11-07 08:02:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1187 states have (on average 1.1752316764953665) internal successors, (1395), 1246 states have internal predecessors, (1395), 281 states have call successors, (281), 78 states have call predecessors, (281), 150 states have return successors, (704), 298 states have call predecessors, (704), 273 states have call successors, (704) [2021-11-07 08:02:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 2380 transitions. [2021-11-07 08:02:50,259 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 2380 transitions. Word has length 44 [2021-11-07 08:02:50,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:50,259 INFO L470 AbstractCegarLoop]: Abstraction has 1623 states and 2380 transitions. [2021-11-07 08:02:50,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 7 states have internal predecessors, (34), 4 states have call successors, (6), 4 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 2380 transitions. [2021-11-07 08:02:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-07 08:02:50,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:50,263 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:02:50,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:50,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:02:50,489 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:50,489 INFO L85 PathProgramCache]: Analyzing trace with hash 865218898, now seen corresponding path program 1 times [2021-11-07 08:02:50,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:50,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261121304] [2021-11-07 08:02:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:50,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:50,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:50,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:50,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:02:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:50,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-07 08:02:50,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 08:02:50,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:50,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261121304] [2021-11-07 08:02:50,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261121304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:50,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102607525] [2021-11-07 08:02:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:50,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:50,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:50,544 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:50,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:02:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:02:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:50,894 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-07 08:02:50,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102607525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:50,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:50,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-11-07 08:02:50,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001130757] [2021-11-07 08:02:50,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:02:50,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:50,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:02:50,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:02:50,896 INFO L87 Difference]: Start difference. First operand 1623 states and 2380 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-11-07 08:02:51,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:51,082 INFO L93 Difference]: Finished difference Result 2547 states and 3964 transitions. [2021-11-07 08:02:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:02:51,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 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 [2021-11-07 08:02:51,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:51,091 INFO L225 Difference]: With dead ends: 2547 [2021-11-07 08:02:51,091 INFO L226 Difference]: Without dead ends: 1034 [2021-11-07 08:02:51,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:02:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-11-07 08:02:51,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 1006. [2021-11-07 08:02:51,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1006 states, 749 states have (on average 1.1401869158878504) internal successors, (854), 775 states have internal predecessors, (854), 180 states have call successors, (180), 56 states have call predecessors, (180), 72 states have return successors, (288), 174 states have call predecessors, (288), 176 states have call successors, (288) [2021-11-07 08:02:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1322 transitions. [2021-11-07 08:02:51,205 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1322 transitions. Word has length 43 [2021-11-07 08:02:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:51,205 INFO L470 AbstractCegarLoop]: Abstraction has 1006 states and 1322 transitions. [2021-11-07 08:02:51,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 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) [2021-11-07 08:02:51,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1322 transitions. [2021-11-07 08:02:51,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 08:02:51,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:51,207 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:51,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:51,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:51,432 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:51,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:51,433 INFO L85 PathProgramCache]: Analyzing trace with hash -151680771, now seen corresponding path program 4 times [2021-11-07 08:02:51,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:51,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389483319] [2021-11-07 08:02:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:51,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:51,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:51,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389483319] [2021-11-07 08:02:51,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389483319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:51,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321369500] [2021-11-07 08:02:51,534 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:02:51,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:51,544 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:51,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:02:51,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:02:51,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:51,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:02:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:51,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321369500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:51,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:51,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-11-07 08:02:51,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629734477] [2021-11-07 08:02:51,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:02:51,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:51,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:02:51,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:02:51,864 INFO L87 Difference]: Start difference. First operand 1006 states and 1322 transitions. Second operand has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:52,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:52,145 INFO L93 Difference]: Finished difference Result 1217 states and 1637 transitions. [2021-11-07 08:02:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:02:52,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 08:02:52,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:52,154 INFO L225 Difference]: With dead ends: 1217 [2021-11-07 08:02:52,154 INFO L226 Difference]: Without dead ends: 1216 [2021-11-07 08:02:52,155 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:02:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-11-07 08:02:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1149. [2021-11-07 08:02:52,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 856 states have (on average 1.1343457943925233) internal successors, (971), 885 states have internal predecessors, (971), 206 states have call successors, (206), 64 states have call predecessors, (206), 82 states have return successors, (330), 199 states have call predecessors, (330), 202 states have call successors, (330) [2021-11-07 08:02:52,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1507 transitions. [2021-11-07 08:02:52,256 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1507 transitions. Word has length 44 [2021-11-07 08:02:52,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:52,257 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 1507 transitions. [2021-11-07 08:02:52,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 8 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1507 transitions. [2021-11-07 08:02:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:02:52,259 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:52,259 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:02:52,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:52,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:52,485 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:52,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:52,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1560392739, now seen corresponding path program 2 times [2021-11-07 08:02:52,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:52,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021396640] [2021-11-07 08:02:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:52,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:52,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:52,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:52,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021396640] [2021-11-07 08:02:52,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021396640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:52,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624484716] [2021-11-07 08:02:52,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:02:52,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:52,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:52,601 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:52,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:02:52,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:02:52,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:52,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:02:52,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:52,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624484716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:52,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:52,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-11-07 08:02:52,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837137324] [2021-11-07 08:02:52,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:02:52,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:02:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:02:52,930 INFO L87 Difference]: Start difference. First operand 1149 states and 1507 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:02:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:53,365 INFO L93 Difference]: Finished difference Result 2021 states and 2949 transitions. [2021-11-07 08:02:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:02:53,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2021-11-07 08:02:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:53,377 INFO L225 Difference]: With dead ends: 2021 [2021-11-07 08:02:53,377 INFO L226 Difference]: Without dead ends: 1275 [2021-11-07 08:02:53,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:02:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-11-07 08:02:53,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1201. [2021-11-07 08:02:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 896 states have (on average 1.1283482142857142) internal successors, (1011), 925 states have internal predecessors, (1011), 214 states have call successors, (214), 68 states have call predecessors, (214), 86 states have return successors, (338), 207 states have call predecessors, (338), 210 states have call successors, (338) [2021-11-07 08:02:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1563 transitions. [2021-11-07 08:02:53,488 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1563 transitions. Word has length 45 [2021-11-07 08:02:53,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:53,489 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 1563 transitions. [2021-11-07 08:02:53,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:02:53,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1563 transitions. [2021-11-07 08:02:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:02:53,491 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:53,491 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:02:53,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:53,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:53,709 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:53,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:53,709 INFO L85 PathProgramCache]: Analyzing trace with hash 442862615, now seen corresponding path program 1 times [2021-11-07 08:02:53,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:53,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956187176] [2021-11-07 08:02:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:53,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:53,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:53,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:53,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:02:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:53,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:53,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:02:53,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:02:53,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:53,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956187176] [2021-11-07 08:02:53,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956187176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:53,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442367813] [2021-11-07 08:02:53,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:53,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:53,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:53,868 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:53,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:02:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:54,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:02:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:02:54,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442367813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:54,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:54,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-11-07 08:02:54,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878744335] [2021-11-07 08:02:54,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:02:54,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:54,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:02:54,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:02:54,221 INFO L87 Difference]: Start difference. First operand 1201 states and 1563 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:02:54,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:54,713 INFO L93 Difference]: Finished difference Result 1885 states and 2927 transitions. [2021-11-07 08:02:54,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:02:54,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2021-11-07 08:02:54,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:54,730 INFO L225 Difference]: With dead ends: 1885 [2021-11-07 08:02:54,730 INFO L226 Difference]: Without dead ends: 1882 [2021-11-07 08:02:54,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:02:54,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-11-07 08:02:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1624. [2021-11-07 08:02:54,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1168 states have (on average 1.115582191780822) internal successors, (1303), 1201 states have internal predecessors, (1303), 296 states have call successors, (296), 76 states have call predecessors, (296), 155 states have return successors, (906), 346 states have call predecessors, (906), 291 states have call successors, (906) [2021-11-07 08:02:54,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2505 transitions. [2021-11-07 08:02:54,904 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2505 transitions. Word has length 52 [2021-11-07 08:02:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:54,905 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2505 transitions. [2021-11-07 08:02:54,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 12 states have internal predecessors, (37), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:02:54,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2505 transitions. [2021-11-07 08:02:54,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 08:02:54,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:54,908 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:54,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:55,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:55,121 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -826658841, now seen corresponding path program 5 times [2021-11-07 08:02:55,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:55,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948933264] [2021-11-07 08:02:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:55,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:55,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:55,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948933264] [2021-11-07 08:02:55,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948933264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:55,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927649512] [2021-11-07 08:02:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:02:55,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:55,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:55,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:02:55,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 08:02:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:02:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:55,615 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:55,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927649512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:55,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:55,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-11-07 08:02:55,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254215585] [2021-11-07 08:02:55,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:02:55,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:55,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:02:55,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:02:55,617 INFO L87 Difference]: Start difference. First operand 1624 states and 2505 transitions. Second operand has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:55,982 INFO L93 Difference]: Finished difference Result 1872 states and 2918 transitions. [2021-11-07 08:02:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:02:55,983 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 08:02:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:55,998 INFO L225 Difference]: With dead ends: 1872 [2021-11-07 08:02:55,998 INFO L226 Difference]: Without dead ends: 1871 [2021-11-07 08:02:55,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:02:56,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-11-07 08:02:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1792. [2021-11-07 08:02:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1290 states have (on average 1.1124031007751938) internal successors, (1435), 1326 states have internal predecessors, (1435), 327 states have call successors, (327), 84 states have call predecessors, (327), 170 states have return successors, (996), 381 states have call predecessors, (996), 322 states have call successors, (996) [2021-11-07 08:02:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2758 transitions. [2021-11-07 08:02:56,144 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2758 transitions. Word has length 52 [2021-11-07 08:02:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:56,144 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2758 transitions. [2021-11-07 08:02:56,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 9 states have internal predecessors, (46), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:02:56,145 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2758 transitions. [2021-11-07 08:02:56,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:02:56,147 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:56,148 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:56,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:56,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:02:56,365 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:56,365 INFO L85 PathProgramCache]: Analyzing trace with hash -276993676, now seen corresponding path program 2 times [2021-11-07 08:02:56,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:56,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281370601] [2021-11-07 08:02:56,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:56,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:02:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:56,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:02:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 25 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:02:56,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:56,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281370601] [2021-11-07 08:02:56,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281370601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:56,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553749490] [2021-11-07 08:02:56,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:02:56,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:56,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:56,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:56,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:02:56,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:02:56,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:56,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:02:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:02:57,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553749490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:57,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:57,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 21 [2021-11-07 08:02:57,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619383830] [2021-11-07 08:02:57,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:02:57,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:02:57,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:02:57,111 INFO L87 Difference]: Start difference. First operand 1792 states and 2758 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-07 08:02:59,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:59,156 INFO L93 Difference]: Finished difference Result 5062 states and 11459 transitions. [2021-11-07 08:02:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:02:59,157 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-11-07 08:02:59,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:59,219 INFO L225 Difference]: With dead ends: 5062 [2021-11-07 08:02:59,219 INFO L226 Difference]: Without dead ends: 3748 [2021-11-07 08:02:59,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=813, Invalid=3093, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:02:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-07 08:02:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3038. [2021-11-07 08:02:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 2077 states have (on average 1.0890707751564757) internal successors, (2262), 2091 states have internal predecessors, (2262), 580 states have call successors, (580), 104 states have call predecessors, (580), 376 states have return successors, (3348), 842 states have call predecessors, (3348), 572 states have call successors, (3348) [2021-11-07 08:02:59,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 6190 transitions. [2021-11-07 08:02:59,628 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 6190 transitions. Word has length 61 [2021-11-07 08:02:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:59,629 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 6190 transitions. [2021-11-07 08:02:59,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 17 states have internal predecessors, (62), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 4 states have call successors, (10) [2021-11-07 08:02:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 6190 transitions. [2021-11-07 08:02:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-07 08:02:59,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:59,633 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:59,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:59,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:59,861 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:02:59,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:59,861 INFO L85 PathProgramCache]: Analyzing trace with hash -376187635, now seen corresponding path program 3 times [2021-11-07 08:02:59,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:59,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949389764] [2021-11-07 08:02:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:59,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:59,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:02:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:59,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:02:59,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:02:59,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:59,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949389764] [2021-11-07 08:02:59,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949389764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:59,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738162623] [2021-11-07 08:02:59,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:02:59,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:59,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:59,968 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:59,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:03:00,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:03:00,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:00,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:03:00,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 08:03:00,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738162623] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:00,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:00,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-11-07 08:03:00,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189413976] [2021-11-07 08:03:00,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:03:00,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:00,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:03:00,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:03:00,453 INFO L87 Difference]: Start difference. First operand 3038 states and 6190 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:03:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:01,286 INFO L93 Difference]: Finished difference Result 3748 states and 8567 transitions. [2021-11-07 08:03:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:03:01,287 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-11-07 08:03:01,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:01,343 INFO L225 Difference]: With dead ends: 3748 [2021-11-07 08:03:01,343 INFO L226 Difference]: Without dead ends: 3747 [2021-11-07 08:03:01,347 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=706, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:03:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-07 08:03:01,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 3038. [2021-11-07 08:03:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3038 states, 2077 states have (on average 1.0837746750120365) internal successors, (2251), 2091 states have internal predecessors, (2251), 580 states have call successors, (580), 104 states have call predecessors, (580), 376 states have return successors, (3348), 842 states have call predecessors, (3348), 572 states have call successors, (3348) [2021-11-07 08:03:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 6179 transitions. [2021-11-07 08:03:01,778 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 6179 transitions. Word has length 53 [2021-11-07 08:03:01,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:01,778 INFO L470 AbstractCegarLoop]: Abstraction has 3038 states and 6179 transitions. [2021-11-07 08:03:01,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 08:03:01,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 6179 transitions. [2021-11-07 08:03:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 08:03:01,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:01,781 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:01,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:01,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:03:01,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:01,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:01,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1991697283, now seen corresponding path program 3 times [2021-11-07 08:03:01,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:01,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710328179] [2021-11-07 08:03:01,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:01,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:03:02,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:02,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710328179] [2021-11-07 08:03:02,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710328179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:02,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167885299] [2021-11-07 08:03:02,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:02,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:02,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:02,112 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:02,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:03:02,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-07 08:03:02,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:02,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:03:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 08:03:02,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167885299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:02,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:02,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-11-07 08:03:02,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625769618] [2021-11-07 08:03:02,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:03:02,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:02,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:03:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:03:02,572 INFO L87 Difference]: Start difference. First operand 3038 states and 6179 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 5 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:03,053 INFO L93 Difference]: Finished difference Result 3762 states and 7639 transitions. [2021-11-07 08:03:03,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:03:03,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 5 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 08:03:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:03,088 INFO L225 Difference]: With dead ends: 3762 [2021-11-07 08:03:03,088 INFO L226 Difference]: Without dead ends: 3760 [2021-11-07 08:03:03,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:03:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-11-07 08:03:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3743. [2021-11-07 08:03:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 2563 states have (on average 1.0834959032383924) internal successors, (2777), 2582 states have internal predecessors, (2777), 714 states have call successors, (714), 130 states have call predecessors, (714), 461 states have return successors, (4131), 1030 states have call predecessors, (4131), 706 states have call successors, (4131) [2021-11-07 08:03:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 7622 transitions. [2021-11-07 08:03:03,483 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 7622 transitions. Word has length 58 [2021-11-07 08:03:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:03,484 INFO L470 AbstractCegarLoop]: Abstraction has 3743 states and 7622 transitions. [2021-11-07 08:03:03,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 8 states have internal predecessors, (44), 5 states have call successors, (8), 5 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 7622 transitions. [2021-11-07 08:03:03,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 08:03:03,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:03,486 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:03:03,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:03,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 08:03:03,701 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash 526800899, now seen corresponding path program 1 times [2021-11-07 08:03:03,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:03,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395192363] [2021-11-07 08:03:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:03,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:03,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:03,877 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:03:03,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:03,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395192363] [2021-11-07 08:03:03,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395192363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:03,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366062523] [2021-11-07 08:03:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:03,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:03,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:03,879 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:03,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:03:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:03:04,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 08:03:04,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366062523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:04,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:04,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-11-07 08:03:04,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519888947] [2021-11-07 08:03:04,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:03:04,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:03:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:03:04,413 INFO L87 Difference]: Start difference. First operand 3743 states and 7622 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:03:05,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:05,590 INFO L93 Difference]: Finished difference Result 10498 states and 30983 transitions. [2021-11-07 08:03:05,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:03:05,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-11-07 08:03:05,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:05,703 INFO L225 Difference]: With dead ends: 10498 [2021-11-07 08:03:05,703 INFO L226 Difference]: Without dead ends: 7487 [2021-11-07 08:03:05,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=1097, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:03:05,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7487 states. [2021-11-07 08:03:06,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7487 to 4967. [2021-11-07 08:03:06,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 3311 states have (on average 1.06312292358804) internal successors, (3520), 3330 states have internal predecessors, (3520), 978 states have call successors, (978), 140 states have call predecessors, (978), 673 states have return successors, (6367), 1496 states have call predecessors, (6367), 968 states have call successors, (6367) [2021-11-07 08:03:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 10865 transitions. [2021-11-07 08:03:06,551 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 10865 transitions. Word has length 56 [2021-11-07 08:03:06,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:06,551 INFO L470 AbstractCegarLoop]: Abstraction has 4967 states and 10865 transitions. [2021-11-07 08:03:06,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-07 08:03:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 10865 transitions. [2021-11-07 08:03:06,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 08:03:06,554 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:06,554 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:06,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:06,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:03:06,765 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:06,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:06,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1067041056, now seen corresponding path program 2 times [2021-11-07 08:03:06,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:06,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90972286] [2021-11-07 08:03:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:06,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:06,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:06,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:06,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:06,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:06,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 48 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:03:06,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:06,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90972286] [2021-11-07 08:03:06,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90972286] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:06,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445340123] [2021-11-07 08:03:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:06,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:06,922 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:06,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:03:07,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:03:07,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:07,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:03:07,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 37 proven. 14 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 08:03:07,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445340123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:07,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:07,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 15 [2021-11-07 08:03:07,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450917784] [2021-11-07 08:03:07,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:03:07,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:07,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:03:07,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:03:07,487 INFO L87 Difference]: Start difference. First operand 4967 states and 10865 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:08,277 INFO L93 Difference]: Finished difference Result 8746 states and 21921 transitions. [2021-11-07 08:03:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:03:08,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2021-11-07 08:03:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:08,310 INFO L225 Difference]: With dead ends: 8746 [2021-11-07 08:03:08,310 INFO L226 Difference]: Without dead ends: 4511 [2021-11-07 08:03:08,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:03:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-11-07 08:03:08,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3878. [2021-11-07 08:03:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 2600 states have (on average 1.0688461538461538) internal successors, (2779), 2686 states have internal predecessors, (2779), 826 states have call successors, (826), 135 states have call predecessors, (826), 447 states have return successors, (2602), 1056 states have call predecessors, (2602), 817 states have call successors, (2602) [2021-11-07 08:03:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 6207 transitions. [2021-11-07 08:03:08,817 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 6207 transitions. Word has length 65 [2021-11-07 08:03:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:08,817 INFO L470 AbstractCegarLoop]: Abstraction has 3878 states and 6207 transitions. [2021-11-07 08:03:08,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:08,818 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 6207 transitions. [2021-11-07 08:03:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 08:03:08,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:08,820 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:08,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:09,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:03:09,038 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:09,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1996075823, now seen corresponding path program 6 times [2021-11-07 08:03:09,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:09,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923099842] [2021-11-07 08:03:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:09,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:09,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:09,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923099842] [2021-11-07 08:03:09,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923099842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:09,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904519690] [2021-11-07 08:03:09,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:03:09,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:09,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:09,173 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:09,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:03:09,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 08:03:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:03:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:09,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904519690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:09,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:09,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-11-07 08:03:09,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946787697] [2021-11-07 08:03:09,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:03:09,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:09,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:03:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:03:09,675 INFO L87 Difference]: Start difference. First operand 3878 states and 6207 transitions. Second operand has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:10,169 INFO L93 Difference]: Finished difference Result 4212 states and 6700 transitions. [2021-11-07 08:03:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:03:10,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 08:03:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:10,185 INFO L225 Difference]: With dead ends: 4212 [2021-11-07 08:03:10,185 INFO L226 Difference]: Without dead ends: 4211 [2021-11-07 08:03:10,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:03:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2021-11-07 08:03:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 4198. [2021-11-07 08:03:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4198 states, 2816 states have (on average 1.0678267045454546) internal successors, (3007), 2912 states have internal predecessors, (3007), 888 states have call successors, (888), 145 states have call predecessors, (888), 489 states have return successors, (2804), 1140 states have call predecessors, (2804), 879 states have call successors, (2804) [2021-11-07 08:03:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 6699 transitions. [2021-11-07 08:03:10,536 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 6699 transitions. Word has length 60 [2021-11-07 08:03:10,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:10,537 INFO L470 AbstractCegarLoop]: Abstraction has 4198 states and 6699 transitions. [2021-11-07 08:03:10,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.533333333333333) internal successors, (53), 10 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:10,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 6699 transitions. [2021-11-07 08:03:10,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 08:03:10,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:10,540 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:10,574 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-07 08:03:10,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:03:10,765 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1451661549, now seen corresponding path program 3 times [2021-11-07 08:03:10,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:10,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416826108] [2021-11-07 08:03:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:10,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:10,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:10,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:10,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 59 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:03:10,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:10,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416826108] [2021-11-07 08:03:10,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416826108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:10,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959610243] [2021-11-07 08:03:10,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:10,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:10,937 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:10,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:03:11,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:03:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:11,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:03:11,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 08:03:11,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959610243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:11,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:11,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2021-11-07 08:03:11,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192090279] [2021-11-07 08:03:11,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:03:11,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:03:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:03:11,582 INFO L87 Difference]: Start difference. First operand 4198 states and 6699 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 17 states have internal predecessors, (80), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-07 08:03:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:13,029 INFO L93 Difference]: Finished difference Result 7573 states and 13527 transitions. [2021-11-07 08:03:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:03:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 17 states have internal predecessors, (80), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 64 [2021-11-07 08:03:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:13,058 INFO L225 Difference]: With dead ends: 7573 [2021-11-07 08:03:13,059 INFO L226 Difference]: Without dead ends: 4124 [2021-11-07 08:03:13,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=711, Invalid=3195, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 08:03:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-11-07 08:03:13,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3922. [2021-11-07 08:03:13,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 2631 states have (on average 1.057392626377803) internal successors, (2782), 2717 states have internal predecessors, (2782), 820 states have call successors, (820), 140 states have call predecessors, (820), 466 states have return successors, (1842), 1064 states have call predecessors, (1842), 813 states have call successors, (1842) [2021-11-07 08:03:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 5444 transitions. [2021-11-07 08:03:13,450 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 5444 transitions. Word has length 64 [2021-11-07 08:03:13,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:13,451 INFO L470 AbstractCegarLoop]: Abstraction has 3922 states and 5444 transitions. [2021-11-07 08:03:13,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 17 states have internal predecessors, (80), 8 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-07 08:03:13,452 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 5444 transitions. [2021-11-07 08:03:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 08:03:13,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:13,455 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:13,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:13,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:13,670 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash 55857866, now seen corresponding path program 4 times [2021-11-07 08:03:13,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:13,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958780327] [2021-11-07 08:03:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:13,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 72 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:03:13,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:13,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958780327] [2021-11-07 08:03:13,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958780327] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:13,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579976797] [2021-11-07 08:03:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:03:13,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:13,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:13,901 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:13,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:03:14,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:03:14,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:14,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:03:14,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 61 proven. 23 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 08:03:14,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579976797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:14,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:14,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-11-07 08:03:14,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832318069] [2021-11-07 08:03:14,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:03:14,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:14,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:03:14,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:03:14,569 INFO L87 Difference]: Start difference. First operand 3922 states and 5444 transitions. Second operand has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:15,207 INFO L93 Difference]: Finished difference Result 6533 states and 9687 transitions. [2021-11-07 08:03:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:03:15,207 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2021-11-07 08:03:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:15,232 INFO L225 Difference]: With dead ends: 6533 [2021-11-07 08:03:15,232 INFO L226 Difference]: Without dead ends: 3360 [2021-11-07 08:03:15,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=1234, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:03:15,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2021-11-07 08:03:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3284. [2021-11-07 08:03:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2248 states have (on average 1.0640569395017794) internal successors, (2392), 2327 states have internal predecessors, (2392), 658 states have call successors, (658), 133 states have call predecessors, (658), 373 states have return successors, (1338), 823 states have call predecessors, (1338), 653 states have call successors, (1338) [2021-11-07 08:03:15,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4388 transitions. [2021-11-07 08:03:15,551 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4388 transitions. Word has length 73 [2021-11-07 08:03:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:15,552 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 4388 transitions. [2021-11-07 08:03:15,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 13 states have internal predecessors, (49), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:15,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4388 transitions. [2021-11-07 08:03:15,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 08:03:15,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:15,555 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:15,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:15,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:15,769 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:15,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:15,769 INFO L85 PathProgramCache]: Analyzing trace with hash 973332411, now seen corresponding path program 7 times [2021-11-07 08:03:15,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:15,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151518691] [2021-11-07 08:03:15,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:15,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:15,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151518691] [2021-11-07 08:03:15,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151518691] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:15,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543926200] [2021-11-07 08:03:15,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:03:15,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:15,950 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:16,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:03:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:16,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:03:16,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:16,583 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:16,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543926200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:16,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:16,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 08:03:16,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223805439] [2021-11-07 08:03:16,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:03:16,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:16,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:03:16,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:03:16,585 INFO L87 Difference]: Start difference. First operand 3284 states and 4388 transitions. Second operand has 19 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 11 states have internal predecessors, (60), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:17,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:17,077 INFO L93 Difference]: Finished difference Result 3602 states and 4793 transitions. [2021-11-07 08:03:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:03:17,078 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 11 states have internal predecessors, (60), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 08:03:17,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:17,091 INFO L225 Difference]: With dead ends: 3602 [2021-11-07 08:03:17,092 INFO L226 Difference]: Without dead ends: 3601 [2021-11-07 08:03:17,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=361, Invalid=761, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:03:17,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3601 states. [2021-11-07 08:03:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3601 to 3570. [2021-11-07 08:03:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3570 states, 2444 states have (on average 1.0638297872340425) internal successors, (2600), 2532 states have internal predecessors, (2600), 713 states have call successors, (713), 143 states have call predecessors, (713), 408 states have return successors, (1462), 894 states have call predecessors, (1462), 708 states have call successors, (1462) [2021-11-07 08:03:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3570 states to 3570 states and 4775 transitions. [2021-11-07 08:03:17,351 INFO L78 Accepts]: Start accepts. Automaton has 3570 states and 4775 transitions. Word has length 68 [2021-11-07 08:03:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:17,352 INFO L470 AbstractCegarLoop]: Abstraction has 3570 states and 4775 transitions. [2021-11-07 08:03:17,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 11 states have internal predecessors, (60), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:17,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3570 states and 4775 transitions. [2021-11-07 08:03:17,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 08:03:17,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:17,355 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:17,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:17,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:03:17,581 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:17,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -621206646, now seen corresponding path program 4 times [2021-11-07 08:03:17,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:17,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248467055] [2021-11-07 08:03:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:17,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:17,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:03:17,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:17,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248467055] [2021-11-07 08:03:17,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248467055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:17,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354382312] [2021-11-07 08:03:17,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:03:17,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:17,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:17,721 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:17,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:03:18,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:03:18,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:18,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:03:18,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-07 08:03:18,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354382312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:18,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:18,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-11-07 08:03:18,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205707191] [2021-11-07 08:03:18,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:03:18,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:03:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:03:18,486 INFO L87 Difference]: Start difference. First operand 3570 states and 4775 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:18,879 INFO L93 Difference]: Finished difference Result 4268 states and 5716 transitions. [2021-11-07 08:03:18,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:03:18,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 6 states have call successors, (10), 6 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 72 [2021-11-07 08:03:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:18,896 INFO L225 Difference]: With dead ends: 4268 [2021-11-07 08:03:18,896 INFO L226 Difference]: Without dead ends: 4266 [2021-11-07 08:03:18,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:03:18,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-11-07 08:03:19,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 4250. [2021-11-07 08:03:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 2913 states have (on average 1.0631651218674905) internal successors, (3097), 3019 states have internal predecessors, (3097), 849 states have call successors, (849), 172 states have call predecessors, (849), 483 states have return successors, (1753), 1058 states have call predecessors, (1753), 844 states have call successors, (1753) [2021-11-07 08:03:19,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 5699 transitions. [2021-11-07 08:03:19,267 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 5699 transitions. Word has length 72 [2021-11-07 08:03:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:19,270 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 5699 transitions. [2021-11-07 08:03:19,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 9 states have internal predecessors, (54), 6 states have call successors, (10), 6 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 5699 transitions. [2021-11-07 08:03:19,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:03:19,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:19,273 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:19,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:19,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:03:19,489 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash -963458055, now seen corresponding path program 3 times [2021-11-07 08:03:19,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:19,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652286262] [2021-11-07 08:03:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:19,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:19,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:03:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 35 proven. 35 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-07 08:03:19,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:19,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652286262] [2021-11-07 08:03:19,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652286262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:19,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473055308] [2021-11-07 08:03:19,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:19,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:19,710 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:19,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:03:20,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:03:20,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:03:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-07 08:03:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473055308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:20,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:20,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-11-07 08:03:20,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334112020] [2021-11-07 08:03:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:03:20,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:03:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:03:20,477 INFO L87 Difference]: Start difference. First operand 4250 states and 5699 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-07 08:03:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:21,127 INFO L93 Difference]: Finished difference Result 6309 states and 8850 transitions. [2021-11-07 08:03:21,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:03:21,128 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 71 [2021-11-07 08:03:21,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:21,159 INFO L225 Difference]: With dead ends: 6309 [2021-11-07 08:03:21,159 INFO L226 Difference]: Without dead ends: 6292 [2021-11-07 08:03:21,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1474, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:03:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2021-11-07 08:03:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 5744. [2021-11-07 08:03:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5744 states, 3839 states have (on average 1.050533993227403) internal successors, (4033), 3937 states have internal predecessors, (4033), 1175 states have call successors, (1175), 193 states have call predecessors, (1175), 725 states have return successors, (2896), 1613 states have call predecessors, (2896), 1170 states have call successors, (2896) [2021-11-07 08:03:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5744 states to 5744 states and 8104 transitions. [2021-11-07 08:03:21,588 INFO L78 Accepts]: Start accepts. Automaton has 5744 states and 8104 transitions. Word has length 71 [2021-11-07 08:03:21,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:21,589 INFO L470 AbstractCegarLoop]: Abstraction has 5744 states and 8104 transitions. [2021-11-07 08:03:21,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-07 08:03:21,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5744 states and 8104 transitions. [2021-11-07 08:03:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:03:21,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:21,594 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:03:21,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:21,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 08:03:21,811 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:21,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:21,811 INFO L85 PathProgramCache]: Analyzing trace with hash 319610036, now seen corresponding path program 5 times [2021-11-07 08:03:21,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:21,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965965102] [2021-11-07 08:03:21,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:21,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:21,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:21,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:21,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:21,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:22,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 34 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:03:22,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:22,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965965102] [2021-11-07 08:03:22,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965965102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:22,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906265743] [2021-11-07 08:03:22,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:03:22,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:22,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:22,043 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:22,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:03:22,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-07 08:03:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:03:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 85 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 08:03:22,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906265743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:22,937 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:22,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2021-11-07 08:03:22,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075131138] [2021-11-07 08:03:22,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:03:22,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:03:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:03:22,944 INFO L87 Difference]: Start difference. First operand 5744 states and 8104 transitions. Second operand has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:23,902 INFO L93 Difference]: Finished difference Result 9641 states and 14105 transitions. [2021-11-07 08:03:23,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:03:23,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 81 [2021-11-07 08:03:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:23,926 INFO L225 Difference]: With dead ends: 9641 [2021-11-07 08:03:23,927 INFO L226 Difference]: Without dead ends: 4966 [2021-11-07 08:03:23,949 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=427, Invalid=1643, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:03:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2021-11-07 08:03:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4965. [2021-11-07 08:03:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 3375 states have (on average 1.0562962962962963) internal successors, (3565), 3481 states have internal predecessors, (3565), 983 states have call successors, (983), 190 states have call predecessors, (983), 602 states have return successors, (2041), 1293 states have call predecessors, (2041), 978 states have call successors, (2041) [2021-11-07 08:03:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 6589 transitions. [2021-11-07 08:03:24,314 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 6589 transitions. Word has length 81 [2021-11-07 08:03:24,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:24,314 INFO L470 AbstractCegarLoop]: Abstraction has 4965 states and 6589 transitions. [2021-11-07 08:03:24,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 14 states have internal predecessors, (56), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:24,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 6589 transitions. [2021-11-07 08:03:24,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-07 08:03:24,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:24,319 INFO L513 BasicCegarLoop]: trace histogram [13, 10, 8, 8, 8, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:24,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:24,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-07 08:03:24,537 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:24,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -153926619, now seen corresponding path program 1 times [2021-11-07 08:03:24,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:24,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296139333] [2021-11-07 08:03:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:24,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-07 08:03:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:03:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 181 proven. 24 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2021-11-07 08:03:24,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:24,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296139333] [2021-11-07 08:03:24,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296139333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:24,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420246839] [2021-11-07 08:03:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:24,662 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:24,663 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:24,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:03:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:25,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:03:25,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 181 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-07 08:03:25,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420246839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:25,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:25,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-11-07 08:03:25,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951691329] [2021-11-07 08:03:25,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:03:25,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:25,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:03:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:03:25,619 INFO L87 Difference]: Start difference. First operand 4965 states and 6589 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-07 08:03:26,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:26,035 INFO L93 Difference]: Finished difference Result 9033 states and 12435 transitions. [2021-11-07 08:03:26,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:03:26,036 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) Word has length 115 [2021-11-07 08:03:26,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:26,055 INFO L225 Difference]: With dead ends: 9033 [2021-11-07 08:03:26,055 INFO L226 Difference]: Without dead ends: 5089 [2021-11-07 08:03:26,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:03:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5089 states. [2021-11-07 08:03:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5089 to 4811. [2021-11-07 08:03:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 3283 states have (on average 1.0578738958269875) internal successors, (3473), 3389 states have internal predecessors, (3473), 951 states have call successors, (951), 190 states have call predecessors, (951), 572 states have return successors, (1922), 1231 states have call predecessors, (1922), 936 states have call successors, (1922) [2021-11-07 08:03:26,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6346 transitions. [2021-11-07 08:03:26,488 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6346 transitions. Word has length 115 [2021-11-07 08:03:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:26,489 INFO L470 AbstractCegarLoop]: Abstraction has 4811 states and 6346 transitions. [2021-11-07 08:03:26,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 10 states have call successors, (12), 2 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 9 states have call successors, (12) [2021-11-07 08:03:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6346 transitions. [2021-11-07 08:03:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 08:03:26,493 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:26,493 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:26,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:26,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-07 08:03:26,709 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash 735897765, now seen corresponding path program 8 times [2021-11-07 08:03:26,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:26,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942553758] [2021-11-07 08:03:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:26,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:26,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:26,949 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:26,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:26,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942553758] [2021-11-07 08:03:26,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942553758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:26,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66117796] [2021-11-07 08:03:26,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:26,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:26,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:26,951 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:26,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:03:27,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:03:27,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:03:27,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:27,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66117796] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:27,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:27,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-11-07 08:03:27,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805793039] [2021-11-07 08:03:27,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:03:27,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:03:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:03:27,773 INFO L87 Difference]: Start difference. First operand 4811 states and 6346 transitions. Second operand has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 12 states have internal predecessors, (67), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:28,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:28,524 INFO L93 Difference]: Finished difference Result 5220 states and 6872 transitions. [2021-11-07 08:03:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:03:28,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 12 states have internal predecessors, (67), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 08:03:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:28,552 INFO L225 Difference]: With dead ends: 5220 [2021-11-07 08:03:28,552 INFO L226 Difference]: Without dead ends: 5219 [2021-11-07 08:03:28,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:03:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5219 states. [2021-11-07 08:03:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5219 to 5184. [2021-11-07 08:03:28,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 3536 states have (on average 1.0576923076923077) internal successors, (3740), 3653 states have internal predecessors, (3740), 1023 states have call successors, (1023), 202 states have call predecessors, (1023), 620 states have return successors, (2089), 1328 states have call predecessors, (2089), 1008 states have call successors, (2089) [2021-11-07 08:03:28,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 6852 transitions. [2021-11-07 08:03:28,925 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 6852 transitions. Word has length 76 [2021-11-07 08:03:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:28,926 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 6852 transitions. [2021-11-07 08:03:28,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.526315789473684) internal successors, (67), 12 states have internal predecessors, (67), 9 states have call successors, (9), 9 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 6852 transitions. [2021-11-07 08:03:28,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 08:03:28,931 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:28,931 INFO L513 BasicCegarLoop]: trace histogram [10, 8, 6, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:28,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:29,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:03:29,157 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:29,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:29,157 INFO L85 PathProgramCache]: Analyzing trace with hash 280616094, now seen corresponding path program 6 times [2021-11-07 08:03:29,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:29,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123433856] [2021-11-07 08:03:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:29,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 120 proven. 59 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-07 08:03:29,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:29,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123433856] [2021-11-07 08:03:29,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123433856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:29,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802212097] [2021-11-07 08:03:29,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:03:29,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:29,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:29,473 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:29,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:03:29,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 08:03:29,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:03:30,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 109 proven. 65 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 08:03:30,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802212097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:30,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:30,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2021-11-07 08:03:30,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105946639] [2021-11-07 08:03:30,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:03:30,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:03:30,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:03:30,249 INFO L87 Difference]: Start difference. First operand 5184 states and 6852 transitions. Second operand has 22 states, 21 states have (on average 3.0) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:31,153 INFO L93 Difference]: Finished difference Result 6016 states and 7945 transitions. [2021-11-07 08:03:31,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:03:31,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-11-07 08:03:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:31,176 INFO L225 Difference]: With dead ends: 6016 [2021-11-07 08:03:31,176 INFO L226 Difference]: Without dead ends: 6015 [2021-11-07 08:03:31,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=479, Invalid=1591, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:03:31,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6015 states. [2021-11-07 08:03:31,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6015 to 5184. [2021-11-07 08:03:31,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 3536 states have (on average 1.0542986425339367) internal successors, (3728), 3653 states have internal predecessors, (3728), 1023 states have call successors, (1023), 202 states have call predecessors, (1023), 620 states have return successors, (2089), 1328 states have call predecessors, (2089), 1008 states have call successors, (2089) [2021-11-07 08:03:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 6840 transitions. [2021-11-07 08:03:31,621 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 6840 transitions. Word has length 89 [2021-11-07 08:03:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:31,622 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 6840 transitions. [2021-11-07 08:03:31,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0) internal successors, (63), 15 states have internal predecessors, (63), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-07 08:03:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 6840 transitions. [2021-11-07 08:03:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 08:03:31,629 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:31,629 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:31,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:31,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:31,857 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:31,857 INFO L85 PathProgramCache]: Analyzing trace with hash 146100183, now seen corresponding path program 5 times [2021-11-07 08:03:31,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:31,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885250245] [2021-11-07 08:03:31,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:31,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:03:32,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:32,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885250245] [2021-11-07 08:03:32,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885250245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:32,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611345412] [2021-11-07 08:03:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:03:32,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:32,041 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:32,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:03:32,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-07 08:03:32,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:32,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:03:32,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 08:03:33,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611345412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:33,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:33,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-11-07 08:03:33,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565127884] [2021-11-07 08:03:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:03:33,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:03:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:03:33,082 INFO L87 Difference]: Start difference. First operand 5184 states and 6840 transitions. Second operand has 17 states, 16 states have (on average 4.0) internal successors, (64), 10 states have internal predecessors, (64), 7 states have call successors, (12), 7 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:33,574 INFO L93 Difference]: Finished difference Result 6028 states and 7966 transitions. [2021-11-07 08:03:33,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:03:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 10 states have internal predecessors, (64), 7 states have call successors, (12), 7 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 08:03:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:33,590 INFO L225 Difference]: With dead ends: 6028 [2021-11-07 08:03:33,590 INFO L226 Difference]: Without dead ends: 6026 [2021-11-07 08:03:33,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:03:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6026 states. [2021-11-07 08:03:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6026 to 6010. [2021-11-07 08:03:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 4103 states have (on average 1.0538630270533755) internal successors, (4324), 4240 states have internal predecessors, (4324), 1186 states have call successors, (1186), 236 states have call predecessors, (1186), 716 states have return successors, (2433), 1533 states have call predecessors, (2433), 1169 states have call successors, (2433) [2021-11-07 08:03:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 7943 transitions. [2021-11-07 08:03:33,875 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 7943 transitions. Word has length 86 [2021-11-07 08:03:33,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:33,875 INFO L470 AbstractCegarLoop]: Abstraction has 6010 states and 7943 transitions. [2021-11-07 08:03:33,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.0) internal successors, (64), 10 states have internal predecessors, (64), 7 states have call successors, (12), 7 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:33,875 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 7943 transitions. [2021-11-07 08:03:33,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:03:33,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:33,878 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:33,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:34,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:03:34,081 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:34,081 INFO L85 PathProgramCache]: Analyzing trace with hash -558143601, now seen corresponding path program 9 times [2021-11-07 08:03:34,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:34,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379370017] [2021-11-07 08:03:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:34,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:34,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:34,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379370017] [2021-11-07 08:03:34,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379370017] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:34,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34409833] [2021-11-07 08:03:34,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:34,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:34,309 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:34,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:03:34,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 08:03:34,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:34,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:03:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:35,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34409833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:35,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:35,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 08:03:35,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097246003] [2021-11-07 08:03:35,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:03:35,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:35,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:03:35,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:03:35,121 INFO L87 Difference]: Start difference. First operand 6010 states and 7943 transitions. Second operand has 23 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 13 states have internal predecessors, (74), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:35,802 INFO L93 Difference]: Finished difference Result 6480 states and 8550 transitions. [2021-11-07 08:03:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:03:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 13 states have internal predecessors, (74), 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 84 [2021-11-07 08:03:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:35,825 INFO L225 Difference]: With dead ends: 6480 [2021-11-07 08:03:35,825 INFO L226 Difference]: Without dead ends: 6479 [2021-11-07 08:03:35,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=551, Invalid=1171, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:03:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2021-11-07 08:03:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 6440. [2021-11-07 08:03:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6440 states, 4395 states have (on average 1.0539249146757679) internal successors, (4632), 4545 states have internal predecessors, (4632), 1269 states have call successors, (1269), 250 states have call predecessors, (1269), 771 states have return successors, (2627), 1644 states have call predecessors, (2627), 1252 states have call successors, (2627) [2021-11-07 08:03:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6440 states to 6440 states and 8528 transitions. [2021-11-07 08:03:36,276 INFO L78 Accepts]: Start accepts. Automaton has 6440 states and 8528 transitions. Word has length 84 [2021-11-07 08:03:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:36,276 INFO L470 AbstractCegarLoop]: Abstraction has 6440 states and 8528 transitions. [2021-11-07 08:03:36,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 13 states have internal predecessors, (74), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 6440 states and 8528 transitions. [2021-11-07 08:03:36,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 08:03:36,281 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:36,281 INFO L513 BasicCegarLoop]: 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] [2021-11-07 08:03:36,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:36,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:03:36,501 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:36,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash -635779733, now seen corresponding path program 4 times [2021-11-07 08:03:36,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:36,501 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291337433] [2021-11-07 08:03:36,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:36,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:03:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-07 08:03:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 51 proven. 65 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-07 08:03:36,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:36,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291337433] [2021-11-07 08:03:36,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291337433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:36,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090400097] [2021-11-07 08:03:36,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:03:36,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:36,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:36,757 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:36,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:03:37,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:03:37,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:03:37,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 34 proven. 67 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-07 08:03:37,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090400097] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:37,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:37,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 20 [2021-11-07 08:03:37,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351662800] [2021-11-07 08:03:37,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:03:37,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:37,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:03:37,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:03:37,802 INFO L87 Difference]: Start difference. First operand 6440 states and 8528 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-07 08:03:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:38,700 INFO L93 Difference]: Finished difference Result 9530 states and 13129 transitions. [2021-11-07 08:03:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:03:38,701 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 90 [2021-11-07 08:03:38,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:38,729 INFO L225 Difference]: With dead ends: 9530 [2021-11-07 08:03:38,729 INFO L226 Difference]: Without dead ends: 9370 [2021-11-07 08:03:38,736 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=2194, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:03:38,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9370 states. [2021-11-07 08:03:39,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9370 to 8612. [2021-11-07 08:03:39,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8612 states, 5746 states have (on average 1.0422902888966237) internal successors, (5989), 5886 states have internal predecessors, (5989), 1735 states have call successors, (1735), 281 states have call predecessors, (1735), 1126 states have return successors, (4178), 2444 states have call predecessors, (4178), 1712 states have call successors, (4178) [2021-11-07 08:03:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8612 states to 8612 states and 11902 transitions. [2021-11-07 08:03:39,212 INFO L78 Accepts]: Start accepts. Automaton has 8612 states and 11902 transitions. Word has length 90 [2021-11-07 08:03:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:39,213 INFO L470 AbstractCegarLoop]: Abstraction has 8612 states and 11902 transitions. [2021-11-07 08:03:39,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 16 states have internal predecessors, (43), 5 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-07 08:03:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8612 states and 11902 transitions. [2021-11-07 08:03:39,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 08:03:39,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:39,218 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:39,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:39,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:39,433 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:39,433 INFO L85 PathProgramCache]: Analyzing trace with hash 147414137, now seen corresponding path program 10 times [2021-11-07 08:03:39,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:39,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834633883] [2021-11-07 08:03:39,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:39,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:39,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:39,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834633883] [2021-11-07 08:03:39,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834633883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:39,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791489005] [2021-11-07 08:03:39,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:03:39,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:39,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:39,788 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:39,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:03:40,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:03:40,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:40,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:03:40,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 0 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:40,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791489005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:40,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:40,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-11-07 08:03:40,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469277420] [2021-11-07 08:03:40,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:03:40,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:40,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:03:40,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:03:40,894 INFO L87 Difference]: Start difference. First operand 8612 states and 11902 transitions. Second operand has 25 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 14 states have internal predecessors, (81), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:41,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:41,774 INFO L93 Difference]: Finished difference Result 9184 states and 12667 transitions. [2021-11-07 08:03:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:03:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 14 states have internal predecessors, (81), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 08:03:41,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:41,802 INFO L225 Difference]: With dead ends: 9184 [2021-11-07 08:03:41,802 INFO L226 Difference]: Without dead ends: 9183 [2021-11-07 08:03:41,807 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=661, Invalid=1409, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:03:41,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2021-11-07 08:03:42,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 9118. [2021-11-07 08:03:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9118 states, 6084 states have (on average 1.042570677186062) internal successors, (6343), 6236 states have internal predecessors, (6343), 1833 states have call successors, (1833), 295 states have call predecessors, (1833), 1196 states have return successors, (4444), 2586 states have call predecessors, (4444), 1810 states have call successors, (4444) [2021-11-07 08:03:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9118 states to 9118 states and 12620 transitions. [2021-11-07 08:03:42,262 INFO L78 Accepts]: Start accepts. Automaton has 9118 states and 12620 transitions. Word has length 92 [2021-11-07 08:03:42,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:42,262 INFO L470 AbstractCegarLoop]: Abstraction has 9118 states and 12620 transitions. [2021-11-07 08:03:42,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 14 states have internal predecessors, (81), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 9118 states and 12620 transitions. [2021-11-07 08:03:42,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:03:42,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:42,267 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:42,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:42,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 08:03:42,489 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:42,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:42,489 INFO L85 PathProgramCache]: Analyzing trace with hash 984838500, now seen corresponding path program 6 times [2021-11-07 08:03:42,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:42,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509752866] [2021-11-07 08:03:42,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:42,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:03:42,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:42,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509752866] [2021-11-07 08:03:42,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509752866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:42,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945863981] [2021-11-07 08:03:42,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:03:42,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:42,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:42,680 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:42,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:03:43,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-07 08:03:43,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:03:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 405 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 08:03:43,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945863981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:43,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:43,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-11-07 08:03:43,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104365776] [2021-11-07 08:03:43,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:03:43,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:43,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:03:43,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:03:43,700 INFO L87 Difference]: Start difference. First operand 9118 states and 12620 transitions. Second operand has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 11 states have internal predecessors, (74), 8 states have call successors, (14), 8 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:44,533 INFO L93 Difference]: Finished difference Result 10418 states and 14435 transitions. [2021-11-07 08:03:44,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:03:44,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 11 states have internal predecessors, (74), 8 states have call successors, (14), 8 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 08:03:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:44,579 INFO L225 Difference]: With dead ends: 10418 [2021-11-07 08:03:44,579 INFO L226 Difference]: Without dead ends: 10416 [2021-11-07 08:03:44,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=361, Invalid=761, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:03:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10416 states. [2021-11-07 08:03:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10416 to 10396. [2021-11-07 08:03:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10396 states, 6939 states have (on average 1.0422251044819137) internal successors, (7232), 7115 states have internal predecessors, (7232), 2091 states have call successors, (2091), 338 states have call predecessors, (2091), 1361 states have return successors, (5083), 2942 states have call predecessors, (5083), 2065 states have call successors, (5083) [2021-11-07 08:03:45,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10396 states to 10396 states and 14406 transitions. [2021-11-07 08:03:45,159 INFO L78 Accepts]: Start accepts. Automaton has 10396 states and 14406 transitions. Word has length 100 [2021-11-07 08:03:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:45,160 INFO L470 AbstractCegarLoop]: Abstraction has 10396 states and 14406 transitions. [2021-11-07 08:03:45,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 11 states have internal predecessors, (74), 8 states have call successors, (14), 8 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 10396 states and 14406 transitions. [2021-11-07 08:03:45,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 08:03:45,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:45,166 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:45,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:45,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:45,393 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:45,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:45,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1775188125, now seen corresponding path program 11 times [2021-11-07 08:03:45,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:45,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873773617] [2021-11-07 08:03:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:45,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:45,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:45,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873773617] [2021-11-07 08:03:45,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873773617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:45,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418226799] [2021-11-07 08:03:45,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:03:45,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:45,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:45,701 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:45,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:03:46,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 08:03:46,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:46,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:03:46,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 0 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:47,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418226799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:47,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:47,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-11-07 08:03:47,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150474673] [2021-11-07 08:03:47,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:03:47,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:03:47,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:03:47,025 INFO L87 Difference]: Start difference. First operand 10396 states and 14406 transitions. Second operand has 27 states, 25 states have (on average 3.52) internal successors, (88), 15 states have internal predecessors, (88), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:48,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:48,006 INFO L93 Difference]: Finished difference Result 11041 states and 15272 transitions. [2021-11-07 08:03:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:03:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.52) internal successors, (88), 15 states have internal predecessors, (88), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-11-07 08:03:48,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:48,061 INFO L225 Difference]: With dead ends: 11041 [2021-11-07 08:03:48,061 INFO L226 Difference]: Without dead ends: 11040 [2021-11-07 08:03:48,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=781, Invalid=1669, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:03:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11040 states. [2021-11-07 08:03:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11040 to 10969. [2021-11-07 08:03:48,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10969 states, 7322 states have (on average 1.0424747336793225) internal successors, (7633), 7512 states have internal predecessors, (7633), 2202 states have call successors, (2202), 354 states have call predecessors, (2202), 1440 states have return successors, (5386), 3102 states have call predecessors, (5386), 2176 states have call successors, (5386) [2021-11-07 08:03:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10969 states to 10969 states and 15221 transitions. [2021-11-07 08:03:48,779 INFO L78 Accepts]: Start accepts. Automaton has 10969 states and 15221 transitions. Word has length 100 [2021-11-07 08:03:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:48,780 INFO L470 AbstractCegarLoop]: Abstraction has 10969 states and 15221 transitions. [2021-11-07 08:03:48,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.52) internal successors, (88), 15 states have internal predecessors, (88), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 10969 states and 15221 transitions. [2021-11-07 08:03:48,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 08:03:48,790 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:48,791 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:48,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:49,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-07 08:03:49,005 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:49,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1457805235, now seen corresponding path program 12 times [2021-11-07 08:03:49,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:49,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228774285] [2021-11-07 08:03:49,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:49,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:49,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:49,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228774285] [2021-11-07 08:03:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228774285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208257263] [2021-11-07 08:03:49,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:03:49,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:49,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:49,302 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:49,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:03:50,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 08:03:50,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:50,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 08:03:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:50,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208257263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:50,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:50,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-11-07 08:03:50,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312477384] [2021-11-07 08:03:50,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:03:50,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:03:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:03:50,356 INFO L87 Difference]: Start difference. First operand 10969 states and 15221 transitions. Second operand has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 16 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:51,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:51,377 INFO L93 Difference]: Finished difference Result 11620 states and 16091 transitions. [2021-11-07 08:03:51,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:03:51,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 16 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-07 08:03:51,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:51,436 INFO L225 Difference]: With dead ends: 11620 [2021-11-07 08:03:51,437 INFO L226 Difference]: Without dead ends: 11619 [2021-11-07 08:03:51,446 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=911, Invalid=1951, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:03:51,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11619 states. [2021-11-07 08:03:52,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11619 to 11542. [2021-11-07 08:03:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11542 states, 7705 states have (on average 1.0426995457495134) internal successors, (8034), 7909 states have internal predecessors, (8034), 2313 states have call successors, (2313), 370 states have call predecessors, (2313), 1519 states have return successors, (5689), 3262 states have call predecessors, (5689), 2287 states have call successors, (5689) [2021-11-07 08:03:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11542 states to 11542 states and 16036 transitions. [2021-11-07 08:03:52,159 INFO L78 Accepts]: Start accepts. Automaton has 11542 states and 16036 transitions. Word has length 108 [2021-11-07 08:03:52,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:52,160 INFO L470 AbstractCegarLoop]: Abstraction has 11542 states and 16036 transitions. [2021-11-07 08:03:52,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.5185185185185186) internal successors, (95), 16 states have internal predecessors, (95), 13 states have call successors, (13), 13 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:52,160 INFO L276 IsEmpty]: Start isEmpty. Operand 11542 states and 16036 transitions. [2021-11-07 08:03:52,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 08:03:52,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:52,166 INFO L513 BasicCegarLoop]: trace histogram [12, 10, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:52,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:52,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-07 08:03:52,367 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:52,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:52,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1570760101, now seen corresponding path program 5 times [2021-11-07 08:03:52,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:52,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40674057] [2021-11-07 08:03:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:52,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:03:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:03:52,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:03:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:03:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:03:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-07 08:03:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-07 08:03:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 69 proven. 104 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-07 08:03:52,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:52,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40674057] [2021-11-07 08:03:52,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40674057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:52,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359991604] [2021-11-07 08:03:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:03:52,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:52,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:52,797 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:52,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:03:53,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-07 08:03:53,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:53,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 08:03:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 47 proven. 106 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2021-11-07 08:03:54,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359991604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:54,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:54,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 23 [2021-11-07 08:03:54,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103074705] [2021-11-07 08:03:54,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:03:54,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:03:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:03:54,206 INFO L87 Difference]: Start difference. First operand 11542 states and 16036 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (11), 10 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-07 08:03:55,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:55,531 INFO L93 Difference]: Finished difference Result 17361 states and 24969 transitions. [2021-11-07 08:03:55,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 08:03:55,532 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (11), 10 states have call predecessors, (11), 5 states have call successors, (11) Word has length 109 [2021-11-07 08:03:55,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:55,603 INFO L225 Difference]: With dead ends: 17361 [2021-11-07 08:03:55,604 INFO L226 Difference]: Without dead ends: 17136 [2021-11-07 08:03:55,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=730, Invalid=3692, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 08:03:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-11-07 08:03:56,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 12408. [2021-11-07 08:03:56,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12408 states, 8228 states have (on average 1.0399854156538648) internal successors, (8557), 8432 states have internal predecessors, (8557), 2500 states have call successors, (2500), 378 states have call predecessors, (2500), 1675 states have return successors, (6110), 3597 states have call predecessors, (6110), 2474 states have call successors, (6110) [2021-11-07 08:03:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12408 states to 12408 states and 17167 transitions. [2021-11-07 08:03:56,450 INFO L78 Accepts]: Start accepts. Automaton has 12408 states and 17167 transitions. Word has length 109 [2021-11-07 08:03:56,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:56,450 INFO L470 AbstractCegarLoop]: Abstraction has 12408 states and 17167 transitions. [2021-11-07 08:03:56,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 18 states have internal predecessors, (46), 6 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (11), 10 states have call predecessors, (11), 5 states have call successors, (11) [2021-11-07 08:03:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 12408 states and 17167 transitions. [2021-11-07 08:03:56,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 08:03:56,455 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:56,455 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:56,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-07 08:03:56,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:56,656 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:03:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:56,656 INFO L85 PathProgramCache]: Analyzing trace with hash -558016463, now seen corresponding path program 7 times [2021-11-07 08:03:56,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:56,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137721001] [2021-11-07 08:03:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:56,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:03:56,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:56,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137721001] [2021-11-07 08:03:56,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137721001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:56,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737712513] [2021-11-07 08:03:56,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:03:56,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:56,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:56,884 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:56,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:03:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:57,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:03:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 542 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 08:03:57,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737712513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:57,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:57,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-11-07 08:03:57,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528802075] [2021-11-07 08:03:57,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:03:57,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:03:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:03:57,964 INFO L87 Difference]: Start difference. First operand 12408 states and 17167 transitions. Second operand has 21 states, 20 states have (on average 4.2) internal successors, (84), 12 states have internal predecessors, (84), 9 states have call successors, (16), 9 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:58,960 INFO L93 Difference]: Finished difference Result 13950 states and 19320 transitions. [2021-11-07 08:03:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:03:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 12 states have internal predecessors, (84), 9 states have call successors, (16), 9 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 114 [2021-11-07 08:03:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:59,012 INFO L225 Difference]: With dead ends: 13950 [2021-11-07 08:03:59,013 INFO L226 Difference]: Without dead ends: 13948 [2021-11-07 08:03:59,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 08:03:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13948 states. [2021-11-07 08:03:59,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13948 to 13926. [2021-11-07 08:03:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13926 states, 9237 states have (on average 1.0397315145610047) internal successors, (9604), 9469 states have internal predecessors, (9604), 2807 states have call successors, (2807), 426 states have call predecessors, (2807), 1877 states have return successors, (6876), 4030 states have call predecessors, (6876), 2778 states have call successors, (6876) [2021-11-07 08:03:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13926 states to 13926 states and 19287 transitions. [2021-11-07 08:03:59,978 INFO L78 Accepts]: Start accepts. Automaton has 13926 states and 19287 transitions. Word has length 114 [2021-11-07 08:03:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:59,978 INFO L470 AbstractCegarLoop]: Abstraction has 13926 states and 19287 transitions. [2021-11-07 08:03:59,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.2) internal successors, (84), 12 states have internal predecessors, (84), 9 states have call successors, (16), 9 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:03:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 13926 states and 19287 transitions. [2021-11-07 08:03:59,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 08:03:59,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:59,985 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:00,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:00,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:04:00,186 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:00,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1716256969, now seen corresponding path program 13 times [2021-11-07 08:04:00,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:00,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152857777] [2021-11-07 08:04:00,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:00,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:00,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:00,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152857777] [2021-11-07 08:04:00,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152857777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:00,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56739894] [2021-11-07 08:04:00,631 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:04:00,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:00,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:00,632 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:00,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:04:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:01,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 08:04:01,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:02,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56739894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:02,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:02,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-11-07 08:04:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233509735] [2021-11-07 08:04:02,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:04:02,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:04:02,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:04:02,073 INFO L87 Difference]: Start difference. First operand 13926 states and 19287 transitions. Second operand has 31 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 17 states have internal predecessors, (102), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:03,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:03,276 INFO L93 Difference]: Finished difference Result 14700 states and 20326 transitions. [2021-11-07 08:04:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 08:04:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 17 states have internal predecessors, (102), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2021-11-07 08:04:03,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:03,326 INFO L225 Difference]: With dead ends: 14700 [2021-11-07 08:04:03,326 INFO L226 Difference]: Without dead ends: 14699 [2021-11-07 08:04:03,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1051, Invalid=2255, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 08:04:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14699 states. [2021-11-07 08:04:04,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14699 to 14616. [2021-11-07 08:04:04,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14616 states, 9695 states have (on average 1.039917483238783) internal successors, (10082), 9943 states have internal predecessors, (10082), 2941 states have call successors, (2941), 444 states have call predecessors, (2941), 1975 states have return successors, (7244), 4228 states have call predecessors, (7244), 2912 states have call successors, (7244) [2021-11-07 08:04:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14616 states to 14616 states and 20267 transitions. [2021-11-07 08:04:04,265 INFO L78 Accepts]: Start accepts. Automaton has 14616 states and 20267 transitions. Word has length 116 [2021-11-07 08:04:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:04,265 INFO L470 AbstractCegarLoop]: Abstraction has 14616 states and 20267 transitions. [2021-11-07 08:04:04,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.5172413793103448) internal successors, (102), 17 states have internal predecessors, (102), 14 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 14616 states and 20267 transitions. [2021-11-07 08:04:04,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 08:04:04,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:04,273 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:04,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:04,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:04:04,477 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -165426143, now seen corresponding path program 14 times [2021-11-07 08:04:04,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:04,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214280317] [2021-11-07 08:04:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:04,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:04,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:04,855 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:04,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:04,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214280317] [2021-11-07 08:04:04,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214280317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:04,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118243370] [2021-11-07 08:04:04,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:04,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:04,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:04,857 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:04,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 08:04:05,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:05,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:05,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:04:05,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:06,087 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:06,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118243370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:06,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:06,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-11-07 08:04:06,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519948679] [2021-11-07 08:04:06,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 08:04:06,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:06,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 08:04:06,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:04:06,090 INFO L87 Difference]: Start difference. First operand 14616 states and 20267 transitions. Second operand has 33 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 18 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:07,572 INFO L93 Difference]: Finished difference Result 15396 states and 21310 transitions. [2021-11-07 08:04:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:04:07,573 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 18 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-11-07 08:04:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:07,652 INFO L225 Difference]: With dead ends: 15396 [2021-11-07 08:04:07,652 INFO L226 Difference]: Without dead ends: 15395 [2021-11-07 08:04:07,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1201, Invalid=2581, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 08:04:07,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15395 states. [2021-11-07 08:04:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15395 to 15306. [2021-11-07 08:04:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15306 states, 10153 states have (on average 1.0400866738894907) internal successors, (10560), 10417 states have internal predecessors, (10560), 3075 states have call successors, (3075), 462 states have call predecessors, (3075), 2073 states have return successors, (7612), 4426 states have call predecessors, (7612), 3046 states have call successors, (7612) [2021-11-07 08:04:08,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15306 states to 15306 states and 21247 transitions. [2021-11-07 08:04:08,617 INFO L78 Accepts]: Start accepts. Automaton has 15306 states and 21247 transitions. Word has length 124 [2021-11-07 08:04:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:08,618 INFO L470 AbstractCegarLoop]: Abstraction has 15306 states and 21247 transitions. [2021-11-07 08:04:08,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 18 states have internal predecessors, (109), 15 states have call successors, (15), 15 states have call predecessors, (15), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 15306 states and 21247 transitions. [2021-11-07 08:04:08,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 08:04:08,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:08,627 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:08,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:08,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 08:04:08,833 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:08,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1429263422, now seen corresponding path program 8 times [2021-11-07 08:04:08,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:08,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55027101] [2021-11-07 08:04:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:08,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 699 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:04:09,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:09,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55027101] [2021-11-07 08:04:09,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55027101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:09,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483894545] [2021-11-07 08:04:09,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:09,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:09,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:09,068 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:09,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 08:04:09,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:09,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:09,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:04:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 699 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-07 08:04:10,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483894545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:10,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:10,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-11-07 08:04:10,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95296436] [2021-11-07 08:04:10,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:04:10,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:10,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:04:10,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:04:10,347 INFO L87 Difference]: Start difference. First operand 15306 states and 21247 transitions. Second operand has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 13 states have internal predecessors, (94), 10 states have call successors, (18), 10 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:11,381 INFO L93 Difference]: Finished difference Result 16994 states and 23612 transitions. [2021-11-07 08:04:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:04:11,382 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 13 states have internal predecessors, (94), 10 states have call successors, (18), 10 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2021-11-07 08:04:11,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:11,446 INFO L225 Difference]: With dead ends: 16994 [2021-11-07 08:04:11,447 INFO L226 Difference]: Without dead ends: 16992 [2021-11-07 08:04:11,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=551, Invalid=1171, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 08:04:11,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16992 states. [2021-11-07 08:04:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16992 to 16968. [2021-11-07 08:04:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16968 states, 11258 states have (on average 1.0398827500444128) internal successors, (11707), 11554 states have internal predecessors, (11707), 3410 states have call successors, (3410), 514 states have call predecessors, (3410), 2295 states have return successors, (8458), 4899 states have call predecessors, (8458), 3378 states have call successors, (8458) [2021-11-07 08:04:12,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16968 states to 16968 states and 23575 transitions. [2021-11-07 08:04:12,437 INFO L78 Accepts]: Start accepts. Automaton has 16968 states and 23575 transitions. Word has length 128 [2021-11-07 08:04:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:12,437 INFO L470 AbstractCegarLoop]: Abstraction has 16968 states and 23575 transitions. [2021-11-07 08:04:12,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.2727272727272725) internal successors, (94), 13 states have internal predecessors, (94), 10 states have call successors, (18), 10 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 16968 states and 23575 transitions. [2021-11-07 08:04:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 08:04:12,448 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:12,449 INFO L513 BasicCegarLoop]: trace histogram [14, 12, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:12,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:12,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 08:04:12,665 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:12,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:12,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1644185791, now seen corresponding path program 6 times [2021-11-07 08:04:12,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:12,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302092770] [2021-11-07 08:04:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:12,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:04:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:04:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:12,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:04:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:13,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:04:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:13,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-07 08:04:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:13,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-07 08:04:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:13,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-07 08:04:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 89 proven. 152 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-07 08:04:13,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:13,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302092770] [2021-11-07 08:04:13,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302092770] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:13,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280344385] [2021-11-07 08:04:13,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:04:13,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:13,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:13,069 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:13,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 08:04:14,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-07 08:04:14,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:04:14,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:14,330 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 62 proven. 154 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2021-11-07 08:04:14,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280344385] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:14,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:14,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2021-11-07 08:04:14,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811552786] [2021-11-07 08:04:14,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:04:14,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:04:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:04:14,331 INFO L87 Difference]: Start difference. First operand 16968 states and 23575 transitions. Second operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 20 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (13), 12 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-07 08:04:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:16,379 INFO L93 Difference]: Finished difference Result 28533 states and 42700 transitions. [2021-11-07 08:04:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 08:04:16,380 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 20 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (13), 12 states have call predecessors, (13), 6 states have call successors, (13) Word has length 128 [2021-11-07 08:04:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:16,489 INFO L225 Difference]: With dead ends: 28533 [2021-11-07 08:04:16,489 INFO L226 Difference]: Without dead ends: 28203 [2021-11-07 08:04:16,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2525 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1187, Invalid=6123, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 08:04:16,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28203 states. [2021-11-07 08:04:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28203 to 18101. [2021-11-07 08:04:17,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18101 states, 11942 states have (on average 1.0375983922291074) internal successors, (12391), 12238 states have internal predecessors, (12391), 3654 states have call successors, (3654), 524 states have call predecessors, (3654), 2500 states have return successors, (9016), 5338 states have call predecessors, (9016), 3622 states have call successors, (9016) [2021-11-07 08:04:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18101 states to 18101 states and 25061 transitions. [2021-11-07 08:04:17,768 INFO L78 Accepts]: Start accepts. Automaton has 18101 states and 25061 transitions. Word has length 128 [2021-11-07 08:04:17,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:17,768 INFO L470 AbstractCegarLoop]: Abstraction has 18101 states and 25061 transitions. [2021-11-07 08:04:17,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 20 states have internal predecessors, (49), 7 states have call successors, (9), 2 states have call predecessors, (9), 8 states have return successors, (13), 12 states have call predecessors, (13), 6 states have call successors, (13) [2021-11-07 08:04:17,769 INFO L276 IsEmpty]: Start isEmpty. Operand 18101 states and 25061 transitions. [2021-11-07 08:04:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 08:04:17,776 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:17,776 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:17,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:17,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:17,977 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash -2104160501, now seen corresponding path program 15 times [2021-11-07 08:04:17,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:17,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407758863] [2021-11-07 08:04:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:17,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:18,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:18,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407758863] [2021-11-07 08:04:18,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407758863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:18,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937458831] [2021-11-07 08:04:18,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:04:18,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:18,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:18,420 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:18,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 08:04:19,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 08:04:19,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:19,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 08:04:19,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 945 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:19,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937458831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:19,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:19,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-11-07 08:04:19,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938631413] [2021-11-07 08:04:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:04:19,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:19,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:04:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:04:19,758 INFO L87 Difference]: Start difference. First operand 18101 states and 25061 transitions. Second operand has 35 states, 33 states have (on average 3.515151515151515) internal successors, (116), 19 states have internal predecessors, (116), 16 states have call successors, (16), 16 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:21,357 INFO L93 Difference]: Finished difference Result 19014 states and 26287 transitions. [2021-11-07 08:04:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 08:04:21,358 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.515151515151515) internal successors, (116), 19 states have internal predecessors, (116), 16 states have call successors, (16), 16 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 132 [2021-11-07 08:04:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:21,421 INFO L225 Difference]: With dead ends: 19014 [2021-11-07 08:04:21,421 INFO L226 Difference]: Without dead ends: 19013 [2021-11-07 08:04:21,432 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1361, Invalid=2929, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 08:04:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19013 states. [2021-11-07 08:04:22,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19013 to 18918. [2021-11-07 08:04:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18918 states, 12481 states have (on average 1.0377373607883984) internal successors, (12952), 12795 states have internal predecessors, (12952), 3813 states have call successors, (3813), 544 states have call predecessors, (3813), 2619 states have return successors, (9455), 5578 states have call predecessors, (9455), 3781 states have call successors, (9455) [2021-11-07 08:04:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18918 states to 18918 states and 26220 transitions. [2021-11-07 08:04:22,576 INFO L78 Accepts]: Start accepts. Automaton has 18918 states and 26220 transitions. Word has length 132 [2021-11-07 08:04:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:22,576 INFO L470 AbstractCegarLoop]: Abstraction has 18918 states and 26220 transitions. [2021-11-07 08:04:22,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.515151515151515) internal successors, (116), 19 states have internal predecessors, (116), 16 states have call successors, (16), 16 states have call predecessors, (16), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:22,577 INFO L276 IsEmpty]: Start isEmpty. Operand 18918 states and 26220 transitions. [2021-11-07 08:04:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 08:04:22,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:22,587 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:22,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:22,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:22,788 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:22,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:22,789 INFO L85 PathProgramCache]: Analyzing trace with hash -570444405, now seen corresponding path program 9 times [2021-11-07 08:04:22,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:22,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978138765] [2021-11-07 08:04:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:22,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:23,080 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:04:23,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:23,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978138765] [2021-11-07 08:04:23,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978138765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:23,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522271771] [2021-11-07 08:04:23,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:04:23,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:23,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:23,088 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:23,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 08:04:24,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 08:04:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 08:04:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-07 08:04:24,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522271771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:24,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:24,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-11-07 08:04:24,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471739193] [2021-11-07 08:04:24,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:04:24,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:24,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:04:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:04:24,528 INFO L87 Difference]: Start difference. First operand 18918 states and 26220 transitions. Second operand has 25 states, 24 states have (on average 4.333333333333333) internal successors, (104), 14 states have internal predecessors, (104), 11 states have call successors, (20), 11 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:25,833 INFO L93 Difference]: Finished difference Result 20796 states and 28845 transitions. [2021-11-07 08:04:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:04:25,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.333333333333333) internal successors, (104), 14 states have internal predecessors, (104), 11 states have call successors, (20), 11 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-07 08:04:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:25,931 INFO L225 Difference]: With dead ends: 20796 [2021-11-07 08:04:25,931 INFO L226 Difference]: Without dead ends: 20794 [2021-11-07 08:04:25,944 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=661, Invalid=1409, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:04:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20794 states. [2021-11-07 08:04:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20794 to 20768. [2021-11-07 08:04:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20768 states, 13704 states have (on average 1.0375802685347344) internal successors, (14219), 14052 states have internal predecessors, (14219), 4187 states have call successors, (4187), 599 states have call predecessors, (4187), 2872 states have return successors, (10400), 6116 states have call predecessors, (10400), 4152 states have call successors, (10400) [2021-11-07 08:04:27,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20768 states to 20768 states and 28806 transitions. [2021-11-07 08:04:27,200 INFO L78 Accepts]: Start accepts. Automaton has 20768 states and 28806 transitions. Word has length 142 [2021-11-07 08:04:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:27,201 INFO L470 AbstractCegarLoop]: Abstraction has 20768 states and 28806 transitions. [2021-11-07 08:04:27,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.333333333333333) internal successors, (104), 14 states have internal predecessors, (104), 11 states have call successors, (20), 11 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20768 states and 28806 transitions. [2021-11-07 08:04:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 08:04:27,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:27,209 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:27,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:27,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:27,425 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash 959563765, now seen corresponding path program 16 times [2021-11-07 08:04:27,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:27,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902898075] [2021-11-07 08:04:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:27,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:27,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:27,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902898075] [2021-11-07 08:04:27,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902898075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:27,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185754368] [2021-11-07 08:04:27,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:04:27,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:27,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:27,929 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:27,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 08:04:29,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:04:29,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:29,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 08:04:29,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:29,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 0 proven. 1072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:29,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185754368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:29,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:29,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-11-07 08:04:29,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898179774] [2021-11-07 08:04:29,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:04:29,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:29,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:04:29,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:04:29,413 INFO L87 Difference]: Start difference. First operand 20768 states and 28806 transitions. Second operand has 37 states, 35 states have (on average 3.5142857142857142) internal successors, (123), 20 states have internal predecessors, (123), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:31,188 INFO L93 Difference]: Finished difference Result 21764 states and 30147 transitions. [2021-11-07 08:04:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 08:04:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 3.5142857142857142) internal successors, (123), 20 states have internal predecessors, (123), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-11-07 08:04:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:31,267 INFO L225 Difference]: With dead ends: 21764 [2021-11-07 08:04:31,267 INFO L226 Difference]: Without dead ends: 21763 [2021-11-07 08:04:31,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1531, Invalid=3299, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 08:04:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21763 states. [2021-11-07 08:04:32,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21763 to 21662. [2021-11-07 08:04:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21662 states, 14294 states have (on average 1.0377081292850148) internal successors, (14833), 14662 states have internal predecessors, (14833), 4361 states have call successors, (4361), 621 states have call predecessors, (4361), 3002 states have return successors, (10882), 6378 states have call predecessors, (10882), 4326 states have call successors, (10882) [2021-11-07 08:04:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21662 states to 21662 states and 30076 transitions. [2021-11-07 08:04:32,698 INFO L78 Accepts]: Start accepts. Automaton has 21662 states and 30076 transitions. Word has length 140 [2021-11-07 08:04:32,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:32,698 INFO L470 AbstractCegarLoop]: Abstraction has 21662 states and 30076 transitions. [2021-11-07 08:04:32,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 3.5142857142857142) internal successors, (123), 20 states have internal predecessors, (123), 17 states have call successors, (17), 17 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:32,699 INFO L276 IsEmpty]: Start isEmpty. Operand 21662 states and 30076 transitions. [2021-11-07 08:04:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 08:04:32,709 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:32,709 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:32,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:32,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:32,911 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:32,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:32,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1243870943, now seen corresponding path program 17 times [2021-11-07 08:04:32,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:32,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032744780] [2021-11-07 08:04:32,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:32,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 1207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:33,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:33,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032744780] [2021-11-07 08:04:33,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032744780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:33,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281887032] [2021-11-07 08:04:33,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:04:33,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:33,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:33,481 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:33,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 08:04:34,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 08:04:34,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:34,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:04:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 1207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:35,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281887032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:35,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:35,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-11-07 08:04:35,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333525175] [2021-11-07 08:04:35,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:04:35,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:35,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:04:35,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:04:35,143 INFO L87 Difference]: Start difference. First operand 21662 states and 30076 transitions. Second operand has 39 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 21 states have internal predecessors, (130), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:37,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:37,377 INFO L93 Difference]: Finished difference Result 22664 states and 31421 transitions. [2021-11-07 08:04:37,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 08:04:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 21 states have internal predecessors, (130), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-11-07 08:04:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:37,456 INFO L225 Difference]: With dead ends: 22664 [2021-11-07 08:04:37,456 INFO L226 Difference]: Without dead ends: 22663 [2021-11-07 08:04:37,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1711, Invalid=3691, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 08:04:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22663 states. [2021-11-07 08:04:38,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22663 to 22556. [2021-11-07 08:04:38,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22556 states, 14884 states have (on average 1.0378258532652513) internal successors, (15447), 15272 states have internal predecessors, (15447), 4535 states have call successors, (4535), 643 states have call predecessors, (4535), 3132 states have return successors, (11364), 6640 states have call predecessors, (11364), 4500 states have call successors, (11364) [2021-11-07 08:04:38,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22556 states to 22556 states and 31346 transitions. [2021-11-07 08:04:38,756 INFO L78 Accepts]: Start accepts. Automaton has 22556 states and 31346 transitions. Word has length 148 [2021-11-07 08:04:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:38,756 INFO L470 AbstractCegarLoop]: Abstraction has 22556 states and 31346 transitions. [2021-11-07 08:04:38,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 21 states have internal predecessors, (130), 18 states have call successors, (18), 18 states have call predecessors, (18), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:38,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22556 states and 31346 transitions. [2021-11-07 08:04:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:04:38,769 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:38,769 INFO L513 BasicCegarLoop]: trace histogram [16, 14, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:38,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:38,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:38,997 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash 906679633, now seen corresponding path program 7 times [2021-11-07 08:04:38,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:38,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413123604] [2021-11-07 08:04:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:38,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-11-07 08:04:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:04:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:04:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:04:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-07 08:04:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-07 08:04:39,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-07 08:04:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-11-07 08:04:39,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 111 proven. 209 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-11-07 08:04:39,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:39,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413123604] [2021-11-07 08:04:39,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413123604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:39,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592057507] [2021-11-07 08:04:39,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:04:39,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:39,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:39,717 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:39,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 08:04:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 08:04:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 79 proven. 211 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-11-07 08:04:41,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592057507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:41,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:41,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 29 [2021-11-07 08:04:41,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113437140] [2021-11-07 08:04:41,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 08:04:41,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 08:04:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-11-07 08:04:41,350 INFO L87 Difference]: Start difference. First operand 22556 states and 31346 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 8 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (15), 14 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-07 08:04:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:44,434 INFO L93 Difference]: Finished difference Result 41856 states and 64816 transitions. [2021-11-07 08:04:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 08:04:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 8 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (15), 14 states have call predecessors, (15), 7 states have call successors, (15) Word has length 147 [2021-11-07 08:04:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:44,570 INFO L225 Difference]: With dead ends: 41856 [2021-11-07 08:04:44,570 INFO L226 Difference]: Without dead ends: 41436 [2021-11-07 08:04:44,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4393 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1913, Invalid=9859, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 08:04:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41436 states. [2021-11-07 08:04:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41436 to 23920. [2021-11-07 08:04:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23920 states, 15707 states have (on average 1.0358438912586745) internal successors, (16270), 16095 states have internal predecessors, (16270), 4827 states have call successors, (4827), 654 states have call predecessors, (4827), 3381 states have return successors, (12046), 7170 states have call predecessors, (12046), 4792 states have call successors, (12046) [2021-11-07 08:04:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23920 states to 23920 states and 33143 transitions. [2021-11-07 08:04:46,660 INFO L78 Accepts]: Start accepts. Automaton has 23920 states and 33143 transitions. Word has length 147 [2021-11-07 08:04:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:46,661 INFO L470 AbstractCegarLoop]: Abstraction has 23920 states and 33143 transitions. [2021-11-07 08:04:46,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 22 states have internal predecessors, (52), 8 states have call successors, (10), 2 states have call predecessors, (10), 9 states have return successors, (15), 14 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-07 08:04:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 23920 states and 33143 transitions. [2021-11-07 08:04:46,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 08:04:46,669 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:46,669 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:46,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-07 08:04:46,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:46,870 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ackermannErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -978334696, now seen corresponding path program 10 times [2021-11-07 08:04:46,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:46,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745776856] [2021-11-07 08:04:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:46,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:04:47,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:47,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745776856] [2021-11-07 08:04:47,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745776856] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:47,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893424439] [2021-11-07 08:04:47,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:04:47,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:47,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:47,226 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:47,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 08:04:48,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:04:48,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:48,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 08:04:48,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-07 08:04:49,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893424439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:49,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:49,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-11-07 08:04:49,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565578162] [2021-11-07 08:04:49,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:04:49,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:49,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:04:49,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:04:49,131 INFO L87 Difference]: Start difference. First operand 23920 states and 33143 transitions. Second operand has 27 states, 26 states have (on average 4.384615384615385) internal successors, (114), 15 states have internal predecessors, (114), 12 states have call successors, (22), 12 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:50,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:50,969 INFO L93 Difference]: Finished difference Result 26075 states and 36155 transitions. [2021-11-07 08:04:50,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:04:50,970 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.384615384615385) internal successors, (114), 15 states have internal predecessors, (114), 12 states have call successors, (22), 12 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 156 [2021-11-07 08:04:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:51,074 INFO L225 Difference]: With dead ends: 26075 [2021-11-07 08:04:51,074 INFO L226 Difference]: Without dead ends: 26073 [2021-11-07 08:04:51,087 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=781, Invalid=1669, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 08:04:51,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26073 states. [2021-11-07 08:04:52,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26073 to 26045. [2021-11-07 08:04:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26045 states, 17105 states have (on average 1.0357205495469162) internal successors, (17716), 17531 states have internal predecessors, (17716), 5257 states have call successors, (5257), 714 states have call predecessors, (5257), 3678 states have return successors, (13139), 7799 states have call predecessors, (13139), 5219 states have call successors, (13139) [2021-11-07 08:04:52,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26045 states to 26045 states and 36112 transitions. [2021-11-07 08:04:52,710 INFO L78 Accepts]: Start accepts. Automaton has 26045 states and 36112 transitions. Word has length 156 [2021-11-07 08:04:52,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:52,710 INFO L470 AbstractCegarLoop]: Abstraction has 26045 states and 36112 transitions. [2021-11-07 08:04:52,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.384615384615385) internal successors, (114), 15 states have internal predecessors, (114), 12 states have call successors, (22), 12 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:04:52,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26045 states and 36112 transitions. [2021-11-07 08:04:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-07 08:04:52,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:52,722 INFO L513 BasicCegarLoop]: trace histogram [28, 22, 18, 18, 18, 17, 17, 17, 15, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:52,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:52,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-07 08:04:52,923 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ackermannErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:04:52,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:52,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1706597867, now seen corresponding path program 2 times [2021-11-07 08:04:52,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:52,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019982069] [2021-11-07 08:04:52,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:52,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-07 08:04:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:04:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:04:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:04:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:04:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-07 08:04:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-07 08:04:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-11-07 08:04:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-07 08:04:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-07 08:04:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-07 08:04:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 371 proven. 92 refuted. 0 times theorem prover too weak. 1559 trivial. 0 not checked. [2021-11-07 08:04:53,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019982069] [2021-11-07 08:04:53,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019982069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:53,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775663102] [2021-11-07 08:04:53,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:53,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:53,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:53,598 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:53,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 08:04:55,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:55,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:55,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 08:04:55,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2022 backedges. 354 proven. 94 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2021-11-07 08:04:55,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775663102] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:55,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:55,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 21 [2021-11-07 08:04:55,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709288564] [2021-11-07 08:04:55,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:04:55,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:04:55,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:04:55,762 INFO L87 Difference]: Start difference. First operand 26045 states and 36112 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (14), 10 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-07 08:04:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:58,209 INFO L93 Difference]: Finished difference Result 36428 states and 53378 transitions. [2021-11-07 08:04:58,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 08:04:58,209 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (14), 10 states have call predecessors, (14), 4 states have call successors, (14) Word has length 246 [2021-11-07 08:04:58,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:58,355 INFO L225 Difference]: With dead ends: 36428 [2021-11-07 08:04:58,355 INFO L226 Difference]: Without dead ends: 36427 [2021-11-07 08:04:58,372 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 280 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=2387, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 08:04:58,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36427 states. [2021-11-07 08:05:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36427 to 26171. [2021-11-07 08:05:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26171 states, 17189 states have (on average 1.0355459887137122) internal successors, (17800), 17615 states have internal predecessors, (17800), 5257 states have call successors, (5257), 714 states have call predecessors, (5257), 3720 states have return successors, (14439), 7841 states have call predecessors, (14439), 5219 states have call successors, (14439) [2021-11-07 08:05:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26171 states to 26171 states and 37496 transitions. [2021-11-07 08:05:00,362 INFO L78 Accepts]: Start accepts. Automaton has 26171 states and 37496 transitions. Word has length 246 [2021-11-07 08:05:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:00,362 INFO L470 AbstractCegarLoop]: Abstraction has 26171 states and 37496 transitions. [2021-11-07 08:05:00,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 16 states have internal predecessors, (54), 5 states have call successors, (8), 2 states have call predecessors, (8), 7 states have return successors, (14), 10 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-07 08:05:00,363 INFO L276 IsEmpty]: Start isEmpty. Operand 26171 states and 37496 transitions. [2021-11-07 08:05:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 08:05:00,378 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:00,378 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:00,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:00,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-07 08:05:00,593 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:05:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash 462789577, now seen corresponding path program 18 times [2021-11-07 08:05:00,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:00,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035821179] [2021-11-07 08:05:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:00,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:01,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:01,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035821179] [2021-11-07 08:05:01,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035821179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:01,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334320109] [2021-11-07 08:05:01,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:05:01,238 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:01,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:01,239 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:01,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 08:05:02,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 08:05:02,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:02,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 08:05:02,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1350 backedges. 0 proven. 1350 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:03,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334320109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:03,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:03,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-11-07 08:05:03,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318482891] [2021-11-07 08:05:03,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 08:05:03,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 08:05:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:05:03,095 INFO L87 Difference]: Start difference. First operand 26171 states and 37496 transitions. Second operand has 41 states, 39 states have (on average 3.5128205128205128) internal successors, (137), 22 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:05,884 INFO L93 Difference]: Finished difference Result 27321 states and 39091 transitions. [2021-11-07 08:05:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 08:05:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 3.5128205128205128) internal successors, (137), 22 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-07 08:05:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:05,980 INFO L225 Difference]: With dead ends: 27321 [2021-11-07 08:05:05,980 INFO L226 Difference]: Without dead ends: 27320 [2021-11-07 08:05:05,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1901, Invalid=4105, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 08:05:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27320 states. [2021-11-07 08:05:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27320 to 27207. [2021-11-07 08:05:07,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27207 states, 17869 states have (on average 1.0356483295092058) internal successors, (18506), 18317 states have internal predecessors, (18506), 5459 states have call successors, (5459), 738 states have call predecessors, (5459), 3874 states have return successors, (15047), 8151 states have call predecessors, (15047), 5421 states have call successors, (15047) [2021-11-07 08:05:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27207 states to 27207 states and 39012 transitions. [2021-11-07 08:05:07,763 INFO L78 Accepts]: Start accepts. Automaton has 27207 states and 39012 transitions. Word has length 156 [2021-11-07 08:05:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:07,763 INFO L470 AbstractCegarLoop]: Abstraction has 27207 states and 39012 transitions. [2021-11-07 08:05:07,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 3.5128205128205128) internal successors, (137), 22 states have internal predecessors, (137), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 27207 states and 39012 transitions. [2021-11-07 08:05:07,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 08:05:07,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:07,781 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:07,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-07 08:05:07,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 08:05:07,997 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ackermannErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ackermannErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ackermannErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2021-11-07 08:05:07,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1236317875, now seen corresponding path program 19 times [2021-11-07 08:05:07,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:07,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720394192] [2021-11-07 08:05:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:07,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 0 proven. 1501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:08,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720394192] [2021-11-07 08:05:08,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720394192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894591624] [2021-11-07 08:05:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:05:08,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:08,936 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:08,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5fcdf252-db3a-46b4-838a-164c6b5082a8/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 08:05:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:10,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 08:05:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:10,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1501 backedges. 0 proven. 1501 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:10,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894591624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:10,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:10,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2021-11-07 08:05:10,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260425202] [2021-11-07 08:05:10,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:05:10,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:05:10,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1343, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:05:10,832 INFO L87 Difference]: Start difference. First operand 27207 states and 39012 transitions. Second operand has 43 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 23 states have internal predecessors, (144), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:05:13,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:13,617 INFO L93 Difference]: Finished difference Result 28363 states and 40611 transitions. [2021-11-07 08:05:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 08:05:13,618 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 3.5121951219512195) internal successors, (144), 23 states have internal predecessors, (144), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-11-07 08:05:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:13,722 INFO L225 Difference]: With dead ends: 28363 [2021-11-07 08:05:13,722 INFO L226 Difference]: Without dead ends: 28362 [2021-11-07 08:05:13,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2101, Invalid=4541, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 08:05:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28362 states.