./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:32:13,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:32:13,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:32:13,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:32:13,344 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:32:13,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:32:13,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:32:13,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:32:13,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:32:13,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:32:13,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:32:13,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:32:13,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:32:13,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:32:13,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:32:13,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:32:13,368 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:32:13,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:32:13,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:32:13,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:32:13,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:32:13,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:32:13,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:32:13,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:32:13,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:32:13,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:32:13,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:32:13,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:32:13,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:32:13,414 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:32:13,415 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:32:13,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:32:13,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:32:13,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:32:13,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:32:13,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:32:13,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:32:13,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:32:13,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:32:13,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:32:13,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:32:13,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-13 02:32:13,487 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:32:13,490 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:32:13,492 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:32:13,492 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:32:13,492 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:32:13,493 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:32:13,493 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:32:13,493 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:32:13,493 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:32:13,494 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:32:13,495 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:32:13,495 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:32:13,496 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:32:13,496 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:32:13,496 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:32:13,496 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:32:13,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:32:13,497 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 02:32:13,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:32:13,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:32:13,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:32:13,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:32:13,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:32:13,499 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-13 02:32:13,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:32:13,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:32:13,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:32:13,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:32:13,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:32:13,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:13,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:32:13,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:32:13,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:32:13,504 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:32:13,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:32:13,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:32:13,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:32:13,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:32:13,505 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 [2021-11-13 02:32:13,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:32:13,879 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:32:13,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:32:13,884 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:32:13,885 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:32:13,886 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/termination-numeric/rec_counter3.c [2021-11-13 02:32:13,956 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/data/67ea1fd5b/7e7b7cf9f1244df8880df59ca0048f41/FLAG9ecf3a560 [2021-11-13 02:32:14,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:32:14,416 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/sv-benchmarks/c/termination-numeric/rec_counter3.c [2021-11-13 02:32:14,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/data/67ea1fd5b/7e7b7cf9f1244df8880df59ca0048f41/FLAG9ecf3a560 [2021-11-13 02:32:14,825 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/data/67ea1fd5b/7e7b7cf9f1244df8880df59ca0048f41 [2021-11-13 02:32:14,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:32:14,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:32:14,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:14,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:32:14,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:32:14,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:14" (1/1) ... [2021-11-13 02:32:14,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e6713b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:14, skipping insertion in model container [2021-11-13 02:32:14,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:32:14" (1/1) ... [2021-11-13 02:32:14,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:32:14,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:32:15,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:15,030 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:32:15,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:32:15,076 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:32:15,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15 WrapperNode [2021-11-13 02:32:15,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:32:15,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:15,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:32:15,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:32:15,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:32:15,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:32:15,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:32:15,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:32:15,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:32:15,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:32:15,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:32:15,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:32:15,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (1/1) ... [2021-11-13 02:32:15,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:32:15,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:15,186 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:32:15,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:32:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-11-13 02:32:15,236 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-11-13 02:32:15,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:32:15,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:32:15,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:32:15,456 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 02:32:15,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:15 BoogieIcfgContainer [2021-11-13 02:32:15,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:32:15,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:32:15,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:32:15,464 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:32:15,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:32:14" (1/3) ... [2021-11-13 02:32:15,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d70be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:15, skipping insertion in model container [2021-11-13 02:32:15,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:32:15" (2/3) ... [2021-11-13 02:32:15,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d70be6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:32:15, skipping insertion in model container [2021-11-13 02:32:15,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:32:15" (3/3) ... [2021-11-13 02:32:15,468 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter3.c [2021-11-13 02:32:15,474 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:32:15,474 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-13 02:32:15,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:32:15,538 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 [2021-11-13 02:32:15,538 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-13 02:32:15,557 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:32:15,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:32:15,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:15,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:32:15,564 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1651969229, now seen corresponding path program 1 times [2021-11-13 02:32:15,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:15,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291463224] [2021-11-13 02:32:15,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:15,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:15,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:15,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:15,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291463224] [2021-11-13 02:32:15,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291463224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:15,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:15,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:15,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812857608] [2021-11-13 02:32:15,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:15,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:32:15,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:15,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:32:15,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:15,837 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-13 02:32:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:15,938 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-11-13 02:32:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:32:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2021-11-13 02:32:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:15,950 INFO L225 Difference]: With dead ends: 26 [2021-11-13 02:32:15,950 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 02:32:15,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:32:15,959 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:15,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 61.54ms Time] [2021-11-13 02:32:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 02:32:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 02:32:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:16,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-13 02:32:16,003 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-11-13 02:32:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:16,004 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-13 02:32:16,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-11-13 02:32:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-13 02:32:16,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 02:32:16,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:16,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:16,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:32:16,006 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:16,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:16,007 INFO L85 PathProgramCache]: Analyzing trace with hash 328561491, now seen corresponding path program 1 times [2021-11-13 02:32:16,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:16,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64008509] [2021-11-13 02:32:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:16,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:16,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:16,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64008509] [2021-11-13 02:32:16,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64008509] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:16,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:16,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:32:16,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528399667] [2021-11-13 02:32:16,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:16,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:32:16,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:16,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:32:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:16,081 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:32:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:16,129 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-13 02:32:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:32:16,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-13 02:32:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:16,131 INFO L225 Difference]: With dead ends: 41 [2021-11-13 02:32:16,131 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 02:32:16,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:32:16,134 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.44ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:16,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 2.44ms Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 28.70ms Time] [2021-11-13 02:32:16,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 02:32:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-11-13 02:32:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 27 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:32:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-13 02:32:16,150 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2021-11-13 02:32:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:16,150 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-13 02:32:16,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:32:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-13 02:32:16,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:32:16,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:16,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:16,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:32:16,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1320766167, now seen corresponding path program 1 times [2021-11-13 02:32:16,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:16,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621012893] [2021-11-13 02:32:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:16,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:16,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:16,222 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:16,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621012893] [2021-11-13 02:32:16,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621012893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:16,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936806129] [2021-11-13 02:32:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:16,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:16,225 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:16,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:32:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:16,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:32:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:16,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:16,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:32:16,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936806129] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:16,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673667430] [2021-11-13 02:32:16,596 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-13 02:32:16,596 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:16,603 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:16,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:16,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-13 02:32:16,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596278710] [2021-11-13 02:32:16,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:16,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:32:16,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:32:16,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:32:16,618 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-13 02:32:16,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:16,757 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-13 02:32:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 12 [2021-11-13 02:32:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:16,763 INFO L225 Difference]: With dead ends: 38 [2021-11-13 02:32:16,763 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 02:32:16,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-13 02:32:16,769 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.19ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.48ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:16,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 61 Invalid, 66 Unknown, 0 Unchecked, 12.19ms Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 65.48ms Time] [2021-11-13 02:32:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 02:32:16,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-13 02:32:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.434782608695652) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 02:32:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-13 02:32:16,796 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 12 [2021-11-13 02:32:16,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:16,797 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-13 02:32:16,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-13 02:32:16,797 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-13 02:32:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:32:16,798 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:16,799 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:16,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 02:32:17,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:17,009 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -753523798, now seen corresponding path program 1 times [2021-11-13 02:32:17,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:17,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871836144] [2021-11-13 02:32:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:17,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:32:17,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:17,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871836144] [2021-11-13 02:32:17,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871836144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:17,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:17,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:32:17,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900687065] [2021-11-13 02:32:17,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:17,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:32:17,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:32:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:17,056 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:17,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:17,076 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-11-13 02:32:17,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:32:17,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-13 02:32:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:17,078 INFO L225 Difference]: With dead ends: 55 [2021-11-13 02:32:17,078 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 02:32:17,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:17,080 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.89ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.55ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:17,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 15 Unknown, 0 Unchecked, 0.89ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 11.55ms Time] [2021-11-13 02:32:17,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 02:32:17,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-13 02:32:17,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 02:32:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-13 02:32:17,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2021-11-13 02:32:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:17,089 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-13 02:32:17,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-13 02:32:17,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:32:17,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:17,090 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:17,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:32:17,091 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:17,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -753522458, now seen corresponding path program 1 times [2021-11-13 02:32:17,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:17,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091429163] [2021-11-13 02:32:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:17,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:17,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:32:17,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:17,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091429163] [2021-11-13 02:32:17,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091429163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:17,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:17,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:32:17,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689461940] [2021-11-13 02:32:17,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:17,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:32:17,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:17,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:32:17,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:32:17,126 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:17,156 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-11-13 02:32:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:32:17,156 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-13 02:32:17,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:17,157 INFO L225 Difference]: With dead ends: 53 [2021-11-13 02:32:17,158 INFO L226 Difference]: Without dead ends: 52 [2021-11-13 02:32:17,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:32:17,159 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:17,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 17.23ms Time] [2021-11-13 02:32:17,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-13 02:32:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2021-11-13 02:32:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.375) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 02:32:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-13 02:32:17,173 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 15 [2021-11-13 02:32:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:17,173 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-13 02:32:17,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-13 02:32:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 02:32:17,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:17,174 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:17,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:32:17,175 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1884359658, now seen corresponding path program 1 times [2021-11-13 02:32:17,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:17,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686960131] [2021-11-13 02:32:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:17,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 02:32:17,203 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:17,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686960131] [2021-11-13 02:32:17,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686960131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:17,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:17,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:32:17,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329997257] [2021-11-13 02:32:17,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:17,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:17,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:17,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:17,205 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:17,217 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-13 02:32:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-13 02:32:17,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:17,218 INFO L225 Difference]: With dead ends: 41 [2021-11-13 02:32:17,218 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 02:32:17,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:17,223 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.39ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.49ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:17,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.39ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 5.49ms Time] [2021-11-13 02:32:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 02:32:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-13 02:32:17,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 30 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 02:32:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-11-13 02:32:17,231 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2021-11-13 02:32:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:17,232 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-11-13 02:32:17,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:17,232 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-11-13 02:32:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 02:32:17,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:17,233 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:17,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:32:17,234 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1142014128, now seen corresponding path program 1 times [2021-11-13 02:32:17,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:17,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505300565] [2021-11-13 02:32:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:17,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:32:17,376 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:17,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505300565] [2021-11-13 02:32:17,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505300565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:17,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181072400] [2021-11-13 02:32:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:17,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:17,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:17,381 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:17,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:32:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:17,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:32:17,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:17,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:32:17,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 02:32:17,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181072400] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:17,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:32:17,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8] total 18 [2021-11-13 02:32:17,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616915063] [2021-11-13 02:32:17,749 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:17,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:32:17,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:32:17,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:32:17,750 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:32:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:17,866 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-13 02:32:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:32:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2021-11-13 02:32:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:17,868 INFO L225 Difference]: With dead ends: 36 [2021-11-13 02:32:17,868 INFO L226 Difference]: Without dead ends: 35 [2021-11-13 02:32:17,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-11-13 02:32:17,870 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 43.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:17,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 43.15ms Time] [2021-11-13 02:32:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-13 02:32:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-13 02:32:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 02:32:17,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-13 02:32:17,877 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2021-11-13 02:32:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:17,877 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-13 02:32:17,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:32:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-13 02:32:17,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 02:32:17,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:17,879 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:17,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 02:32:18,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:18,093 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:18,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:18,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1042699547, now seen corresponding path program 1 times [2021-11-13 02:32:18,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:18,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891537073] [2021-11-13 02:32:18,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:18,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:18,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 02:32:18,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:18,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891537073] [2021-11-13 02:32:18,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891537073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:32:18,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:32:18,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:32:18,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137612566] [2021-11-13 02:32:18,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:32:18,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:32:18,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:18,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:32:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:18,156 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:18,165 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-13 02:32:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:32:18,166 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-11-13 02:32:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:18,167 INFO L225 Difference]: With dead ends: 35 [2021-11-13 02:32:18,167 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 02:32:18,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:32:18,168 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.40ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:18,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 7 Unknown, 0 Unchecked, 0.40ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 5.09ms Time] [2021-11-13 02:32:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 02:32:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-13 02:32:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 02:32:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-13 02:32:18,175 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2021-11-13 02:32:18,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:18,176 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-13 02:32:18,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 02:32:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-13 02:32:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 02:32:18,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:18,178 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:32:18,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:32:18,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:18,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1306881789, now seen corresponding path program 1 times [2021-11-13 02:32:18,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:18,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395305885] [2021-11-13 02:32:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:18,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:32:18,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:18,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395305885] [2021-11-13 02:32:18,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395305885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:18,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990223961] [2021-11-13 02:32:18,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:18,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:18,300 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:18,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:32:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:18,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:32:18,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:32:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 02:32:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990223961] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:18,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [114298783] [2021-11-13 02:32:18,629 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:18,629 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:18,630 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:18,630 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:18,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2021-11-13 02:32:18,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123375769] [2021-11-13 02:32:18,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:18,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:32:18,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:32:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:32:18,635 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:32:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:18,795 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-11-13 02:32:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:32:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2021-11-13 02:32:18,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:18,800 INFO L225 Difference]: With dead ends: 73 [2021-11-13 02:32:18,800 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 02:32:18,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:32:18,806 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.55ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:18,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 150 Invalid, 84 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 65.55ms Time] [2021-11-13 02:32:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 02:32:18,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-13 02:32:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:32:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-13 02:32:18,828 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 29 [2021-11-13 02:32:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:18,829 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-13 02:32:18,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:32:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-13 02:32:18,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:32:18,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:18,840 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-13 02:32:18,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:19,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:19,045 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:19,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1610056419, now seen corresponding path program 2 times [2021-11-13 02:32:19,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:19,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609627117] [2021-11-13 02:32:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:19,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 02:32:19,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:19,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609627117] [2021-11-13 02:32:19,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609627117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:19,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502403561] [2021-11-13 02:32:19,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:32:19,175 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:19,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:19,181 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:19,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:32:19,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 02:32:19,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:32:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 02:32:19,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:19,563 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 02:32:19,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502403561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:19,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443732989] [2021-11-13 02:32:19,572 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:19,572 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:19,573 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:19,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:19,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 21 [2021-11-13 02:32:19,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672999837] [2021-11-13 02:32:19,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:19,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 02:32:19,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 02:32:19,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:32:19,580 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 02:32:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:19,908 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2021-11-13 02:32:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 02:32:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 57 [2021-11-13 02:32:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:19,910 INFO L225 Difference]: With dead ends: 119 [2021-11-13 02:32:19,910 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 02:32:19,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:32:19,912 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:19,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 164 Invalid, 218 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [18 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 110.82ms Time] [2021-11-13 02:32:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 02:32:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-11-13 02:32:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 02:32:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-13 02:32:19,940 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 57 [2021-11-13 02:32:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:19,941 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-13 02:32:19,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 02:32:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-13 02:32:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 02:32:19,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:19,944 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-13 02:32:19,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:20,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 02:32:20,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:20,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1788071820, now seen corresponding path program 3 times [2021-11-13 02:32:20,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:20,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921321995] [2021-11-13 02:32:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:20,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:20,311 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:32:20,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:20,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921321995] [2021-11-13 02:32:20,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921321995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:20,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700935831] [2021-11-13 02:32:20,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:32:20,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:20,315 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:20,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:32:20,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:32:20,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:20,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 02:32:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 9 proven. 75 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:32:20,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 9 proven. 75 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-13 02:32:21,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700935831] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:21,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036851094] [2021-11-13 02:32:21,085 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:21,086 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:21,086 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:21,086 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:21,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2021-11-13 02:32:21,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622943296] [2021-11-13 02:32:21,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:21,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 02:32:21,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:21,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 02:32:21,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-11-13 02:32:21,088 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 26 states, 25 states have (on average 2.64) internal successors, (66), 19 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 02:32:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:21,418 INFO L93 Difference]: Finished difference Result 181 states and 207 transitions. [2021-11-13 02:32:21,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 02:32:21,418 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 19 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 66 [2021-11-13 02:32:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:21,421 INFO L225 Difference]: With dead ends: 181 [2021-11-13 02:32:21,421 INFO L226 Difference]: Without dead ends: 132 [2021-11-13 02:32:21,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1362, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 02:32:21,424 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 84 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.34ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:21,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [13 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 98.34ms Time] [2021-11-13 02:32:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-13 02:32:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2021-11-13 02:32:21,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 9 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 02:32:21,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-13 02:32:21,439 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 66 [2021-11-13 02:32:21,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:21,439 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-13 02:32:21,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.64) internal successors, (66), 19 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 02:32:21,440 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-13 02:32:21,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-13 02:32:21,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:21,444 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 11, 10, 10, 10, 10, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-13 02:32:21,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 02:32:21,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 420558476, now seen corresponding path program 4 times [2021-11-13 02:32:21,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:21,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946913154] [2021-11-13 02:32:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:21,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 334 proven. 26 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-13 02:32:21,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:21,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946913154] [2021-11-13 02:32:21,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946913154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:21,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334532827] [2021-11-13 02:32:21,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:32:21,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:21,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:21,888 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:21,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:32:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:21,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:32:21,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 318 proven. 36 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-13 02:32:22,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 322 proven. 32 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2021-11-13 02:32:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334532827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:23,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [951705235] [2021-11-13 02:32:23,079 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:23,079 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:23,079 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:23,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:23,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 17 [2021-11-13 02:32:23,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929250755] [2021-11-13 02:32:23,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:23,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 02:32:23,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 02:32:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:32:23,082 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:32:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:23,418 INFO L93 Difference]: Finished difference Result 219 states and 244 transitions. [2021-11-13 02:32:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 02:32:23,419 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 144 [2021-11-13 02:32:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:23,421 INFO L225 Difference]: With dead ends: 219 [2021-11-13 02:32:23,421 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 02:32:23,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 282 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2021-11-13 02:32:23,425 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.31ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:23,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 198 Invalid, 270 Unknown, 0 Unchecked, 3.31ms Time], IncrementalHoareTripleChecker [4 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 126.32ms Time] [2021-11-13 02:32:23,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 02:32:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2021-11-13 02:32:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 125 states have (on average 1.088) internal successors, (136), 125 states have internal predecessors, (136), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 10 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:32:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2021-11-13 02:32:23,457 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 144 [2021-11-13 02:32:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:23,458 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2021-11-13 02:32:23,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 02:32:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2021-11-13 02:32:23,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-13 02:32:23,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:23,463 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-13 02:32:23,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:23,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:23,677 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:23,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:23,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1667559860, now seen corresponding path program 5 times [2021-11-13 02:32:23,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:23,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595030828] [2021-11-13 02:32:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:23,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 470 proven. 53 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-11-13 02:32:23,903 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:23,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595030828] [2021-11-13 02:32:23,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595030828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:23,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874234473] [2021-11-13 02:32:23,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:32:23,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:23,906 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:23,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 02:32:23,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-13 02:32:23,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:23,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:32:23,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 185 proven. 12 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-11-13 02:32:24,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 185 proven. 12 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2021-11-13 02:32:24,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874234473] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:24,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [994066017] [2021-11-13 02:32:24,923 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:24,923 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:24,923 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:24,925 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:24,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 33 [2021-11-13 02:32:24,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294142367] [2021-11-13 02:32:24,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:24,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 02:32:24,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 02:32:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 02:32:24,929 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:32:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:25,828 INFO L93 Difference]: Finished difference Result 383 states and 438 transitions. [2021-11-13 02:32:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 02:32:25,828 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 146 [2021-11-13 02:32:25,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:25,832 INFO L225 Difference]: With dead ends: 383 [2021-11-13 02:32:25,832 INFO L226 Difference]: Without dead ends: 293 [2021-11-13 02:32:25,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=675, Invalid=3107, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 02:32:25,837 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 232 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 215.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.67ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 252.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:25,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 224 Invalid, 494 Unknown, 0 Unchecked, 7.67ms Time], IncrementalHoareTripleChecker [41 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 252.37ms Time] [2021-11-13 02:32:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-13 02:32:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 197. [2021-11-13 02:32:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 182 states have (on average 1.0879120879120878) internal successors, (198), 182 states have internal predecessors, (198), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:32:25,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 213 transitions. [2021-11-13 02:32:25,861 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 213 transitions. Word has length 146 [2021-11-13 02:32:25,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:25,861 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 213 transitions. [2021-11-13 02:32:25,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 02:32:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 213 transitions. [2021-11-13 02:32:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-13 02:32:25,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:25,865 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 11, 10, 10, 10, 10, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-13 02:32:25,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:26,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:26,089 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:26,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1195050595, now seen corresponding path program 6 times [2021-11-13 02:32:26,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:26,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004531329] [2021-11-13 02:32:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:26,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 841 proven. 89 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-11-13 02:32:26,426 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:26,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004531329] [2021-11-13 02:32:26,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004531329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:26,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321937261] [2021-11-13 02:32:26,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:32:26,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:26,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:26,429 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:26,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 02:32:26,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:32:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-13 02:32:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 607 proven. 119 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-13 02:32:27,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1506 backedges. 607 proven. 119 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-11-13 02:32:27,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321937261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:27,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413845982] [2021-11-13 02:32:27,942 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:27,942 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:27,942 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:27,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:27,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 14] total 47 [2021-11-13 02:32:27,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556549838] [2021-11-13 02:32:27,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:27,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 02:32:27,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:27,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 02:32:27,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1913, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 02:32:27,947 INFO L87 Difference]: Start difference. First operand 197 states and 213 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 44 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 02:32:30,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:30,573 INFO L93 Difference]: Finished difference Result 791 states and 897 transitions. [2021-11-13 02:32:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-13 02:32:30,574 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 44 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 177 [2021-11-13 02:32:30,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:30,577 INFO L225 Difference]: With dead ends: 791 [2021-11-13 02:32:30,578 INFO L226 Difference]: Without dead ends: 635 [2021-11-13 02:32:30,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3658 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2185, Invalid=12335, Unknown=0, NotChecked=0, Total=14520 [2021-11-13 02:32:30,586 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 500 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 424.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 502.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:30,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 374 Invalid, 1010 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [127 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 502.09ms Time] [2021-11-13 02:32:30,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-11-13 02:32:30,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 274. [2021-11-13 02:32:30,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 256 states have (on average 1.09375) internal successors, (280), 256 states have internal predecessors, (280), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 15 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 02:32:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 298 transitions. [2021-11-13 02:32:30,617 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 298 transitions. Word has length 177 [2021-11-13 02:32:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:30,618 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 298 transitions. [2021-11-13 02:32:30,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 44 states have internal predecessors, (101), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 02:32:30,618 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 298 transitions. [2021-11-13 02:32:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-13 02:32:30,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:30,622 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 11, 10, 10, 10, 10, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1] [2021-11-13 02:32:30,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:30,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 02:32:30,849 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:30,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:30,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387261, now seen corresponding path program 7 times [2021-11-13 02:32:30,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:30,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303734201] [2021-11-13 02:32:30,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:30,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 958 proven. 765 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-11-13 02:32:31,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:31,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303734201] [2021-11-13 02:32:31,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303734201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:31,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823764124] [2021-11-13 02:32:31,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:32:31,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:31,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:31,389 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:31,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 02:32:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:31,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-13 02:32:31,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 976 proven. 747 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-11-13 02:32:32,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 976 proven. 747 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2021-11-13 02:32:34,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823764124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:34,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432034639] [2021-11-13 02:32:34,093 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:34,093 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:34,094 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:34,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:34,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 37 [2021-11-13 02:32:34,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839997522] [2021-11-13 02:32:34,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:34,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 02:32:34,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:34,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 02:32:34,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:32:34,101 INFO L87 Difference]: Start difference. First operand 274 states and 298 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 30 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 02:32:35,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:35,206 INFO L93 Difference]: Finished difference Result 430 states and 470 transitions. [2021-11-13 02:32:35,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-13 02:32:35,207 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 30 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) Word has length 201 [2021-11-13 02:32:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:35,232 INFO L225 Difference]: With dead ends: 430 [2021-11-13 02:32:35,233 INFO L226 Difference]: Without dead ends: 214 [2021-11-13 02:32:35,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1246, Invalid=6064, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 02:32:35,237 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.61ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.62ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:35,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 184 Invalid, 245 Unknown, 0 Unchecked, 5.61ms Time], IncrementalHoareTripleChecker [34 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 167.62ms Time] [2021-11-13 02:32:35,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-13 02:32:35,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-11-13 02:32:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 201 states have (on average 1.0696517412935322) internal successors, (215), 201 states have internal predecessors, (215), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 10 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 02:32:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 228 transitions. [2021-11-13 02:32:35,256 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 228 transitions. Word has length 201 [2021-11-13 02:32:35,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:35,256 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 228 transitions. [2021-11-13 02:32:35,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 30 states have internal predecessors, (88), 1 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (9), 9 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-13 02:32:35,257 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 228 transitions. [2021-11-13 02:32:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-11-13 02:32:35,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:35,261 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 12, 11, 11, 11, 11, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1] [2021-11-13 02:32:35,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:35,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 02:32:35,489 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2053152774, now seen corresponding path program 8 times [2021-11-13 02:32:35,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:35,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665345573] [2021-11-13 02:32:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:35,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2956 backedges. 1770 proven. 311 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2021-11-13 02:32:35,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:35,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665345573] [2021-11-13 02:32:35,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665345573] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:35,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792251648] [2021-11-13 02:32:35,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:32:35,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:35,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:35,958 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:35,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 02:32:36,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-13 02:32:36,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:36,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:32:36,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2956 backedges. 1308 proven. 604 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2021-11-13 02:32:36,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:38,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2956 backedges. 1308 proven. 604 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2021-11-13 02:32:38,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792251648] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:38,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1227221950] [2021-11-13 02:32:38,288 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:38,289 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:38,289 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:38,292 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:38,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 19, 19] total 69 [2021-11-13 02:32:38,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392012910] [2021-11-13 02:32:38,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:38,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-13 02:32:38,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:38,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-13 02:32:38,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=4257, Unknown=0, NotChecked=0, Total=4692 [2021-11-13 02:32:38,297 INFO L87 Difference]: Start difference. First operand 214 states and 228 transitions. Second operand has 69 states, 69 states have (on average 2.260869565217391) internal successors, (156), 58 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:32:42,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:42,819 INFO L93 Difference]: Finished difference Result 524 states and 587 transitions. [2021-11-13 02:32:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-13 02:32:42,819 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.260869565217391) internal successors, (156), 58 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 227 [2021-11-13 02:32:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:42,822 INFO L225 Difference]: With dead ends: 524 [2021-11-13 02:32:42,822 INFO L226 Difference]: Without dead ends: 353 [2021-11-13 02:32:42,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18175 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=8228, Invalid=43074, Unknown=0, NotChecked=0, Total=51302 [2021-11-13 02:32:42,837 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 806 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 468.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.88ms SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 573.32ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:42,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 476 Invalid, 1274 Unknown, 0 Unchecked, 7.88ms Time], IncrementalHoareTripleChecker [230 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 573.32ms Time] [2021-11-13 02:32:42,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-13 02:32:42,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 295. [2021-11-13 02:32:42,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 280 states have (on average 1.0785714285714285) internal successors, (302), 280 states have internal predecessors, (302), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:32:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 317 transitions. [2021-11-13 02:32:42,863 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 317 transitions. Word has length 227 [2021-11-13 02:32:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:42,864 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 317 transitions. [2021-11-13 02:32:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.260869565217391) internal successors, (156), 58 states have internal predecessors, (156), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:32:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 317 transitions. [2021-11-13 02:32:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2021-11-13 02:32:42,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:42,871 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-13 02:32:42,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:43,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:43,097 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:43,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash -866217466, now seen corresponding path program 9 times [2021-11-13 02:32:43,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:43,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170304919] [2021-11-13 02:32:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:43,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6706 backedges. 3961 proven. 499 refuted. 0 times theorem prover too weak. 2246 trivial. 0 not checked. [2021-11-13 02:32:43,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:43,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170304919] [2021-11-13 02:32:43,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170304919] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:43,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808853263] [2021-11-13 02:32:43,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:32:43,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:43,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:43,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:43,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 02:32:43,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:32:43,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:43,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 02:32:43,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:45,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6706 backedges. 1796 proven. 176 refuted. 0 times theorem prover too weak. 4734 trivial. 0 not checked. [2021-11-13 02:32:45,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6706 backedges. 1796 proven. 176 refuted. 0 times theorem prover too weak. 4734 trivial. 0 not checked. [2021-11-13 02:32:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808853263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:46,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367689350] [2021-11-13 02:32:46,755 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:46,755 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:46,756 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:46,758 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:46,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 25] total 86 [2021-11-13 02:32:46,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239798936] [2021-11-13 02:32:46,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:46,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-13 02:32:46,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:46,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-13 02:32:46,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=6425, Unknown=0, NotChecked=0, Total=7310 [2021-11-13 02:32:46,762 INFO L87 Difference]: Start difference. First operand 295 states and 317 transitions. Second operand has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 78 states have internal predecessors, (171), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 02:32:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:50,081 INFO L93 Difference]: Finished difference Result 680 states and 790 transitions. [2021-11-13 02:32:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-13 02:32:50,082 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 78 states have internal predecessors, (171), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 315 [2021-11-13 02:32:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:50,087 INFO L225 Difference]: With dead ends: 680 [2021-11-13 02:32:50,087 INFO L226 Difference]: Without dead ends: 523 [2021-11-13 02:32:50,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12817 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=7469, Invalid=35173, Unknown=0, NotChecked=0, Total=42642 [2021-11-13 02:32:50,094 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 614 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 401.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.59ms SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 465.69ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:50,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 320 Invalid, 1021 Unknown, 0 Unchecked, 5.59ms Time], IncrementalHoareTripleChecker [156 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 465.69ms Time] [2021-11-13 02:32:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-13 02:32:50,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 370. [2021-11-13 02:32:50,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 355 states have (on average 1.087323943661972) internal successors, (386), 355 states have internal predecessors, (386), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 12 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 02:32:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 401 transitions. [2021-11-13 02:32:50,135 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 401 transitions. Word has length 315 [2021-11-13 02:32:50,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:50,136 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 401 transitions. [2021-11-13 02:32:50,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9883720930232558) internal successors, (171), 78 states have internal predecessors, (171), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 02:32:50,137 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 401 transitions. [2021-11-13 02:32:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-11-13 02:32:50,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:50,145 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-13 02:32:50,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:50,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 02:32:50,365 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:50,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:50,365 INFO L85 PathProgramCache]: Analyzing trace with hash 618436137, now seen corresponding path program 10 times [2021-11-13 02:32:50,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:50,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020960499] [2021-11-13 02:32:50,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:50,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9423 backedges. 4605 proven. 2126 refuted. 0 times theorem prover too weak. 2692 trivial. 0 not checked. [2021-11-13 02:32:51,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:51,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020960499] [2021-11-13 02:32:51,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020960499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:51,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002670701] [2021-11-13 02:32:51,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:32:51,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:51,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:51,149 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:51,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 02:32:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 02:32:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9423 backedges. 4629 proven. 2102 refuted. 0 times theorem prover too weak. 2692 trivial. 0 not checked. [2021-11-13 02:32:51,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:56,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9423 backedges. 4629 proven. 2102 refuted. 0 times theorem prover too weak. 2692 trivial. 0 not checked. [2021-11-13 02:32:56,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002670701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:56,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1492420591] [2021-11-13 02:32:56,401 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:56,401 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:56,402 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:32:56,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:56,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 47 [2021-11-13 02:32:56,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473961205] [2021-11-13 02:32:56,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:56,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 02:32:56,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 02:32:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 02:32:56,406 INFO L87 Difference]: Start difference. First operand 370 states and 401 transitions. Second operand has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 38 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 02:32:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:58,147 INFO L93 Difference]: Finished difference Result 630 states and 693 transitions. [2021-11-13 02:32:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 02:32:58,148 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 38 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 354 [2021-11-13 02:32:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:58,151 INFO L225 Difference]: With dead ends: 630 [2021-11-13 02:32:58,151 INFO L226 Difference]: Without dead ends: 400 [2021-11-13 02:32:58,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 714 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2821, Invalid=13435, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 02:32:58,155 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 288 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.40ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 216.84ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:58,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 218 Invalid, 347 Unknown, 0 Unchecked, 2.40ms Time], IncrementalHoareTripleChecker [46 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 216.84ms Time] [2021-11-13 02:32:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-13 02:32:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2021-11-13 02:32:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 384 states have (on average 1.0807291666666667) internal successors, (415), 384 states have internal predecessors, (415), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 13 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 02:32:58,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 431 transitions. [2021-11-13 02:32:58,189 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 431 transitions. Word has length 354 [2021-11-13 02:32:58,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:58,190 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 431 transitions. [2021-11-13 02:32:58,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 38 states have internal predecessors, (110), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 02:32:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 431 transitions. [2021-11-13 02:32:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-11-13 02:32:58,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:58,194 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 15, 14, 14, 14, 14, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2021-11-13 02:32:58,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:58,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 02:32:58,409 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -864847124, now seen corresponding path program 11 times [2021-11-13 02:32:58,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:58,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519322579] [2021-11-13 02:32:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:58,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11308 backedges. 6753 proven. 750 refuted. 0 times theorem prover too weak. 3805 trivial. 0 not checked. [2021-11-13 02:32:59,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:59,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519322579] [2021-11-13 02:32:59,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519322579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:59,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117317106] [2021-11-13 02:32:59,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:32:59,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:59,106 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:59,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 02:32:59,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-13 02:32:59,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 02:32:59,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 11308 backedges. 5065 proven. 3076 refuted. 0 times theorem prover too weak. 3167 trivial. 0 not checked. [2021-11-13 02:33:00,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11308 backedges. 5065 proven. 3076 refuted. 0 times theorem prover too weak. 3167 trivial. 0 not checked. [2021-11-13 02:33:02,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117317106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:02,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227729097] [2021-11-13 02:33:02,956 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:33:02,956 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:02,957 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:33:02,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:02,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 26, 26] total 93 [2021-11-13 02:33:02,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156169689] [2021-11-13 02:33:02,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:02,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-13 02:33:02,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-13 02:33:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=7816, Unknown=0, NotChecked=0, Total=8556 [2021-11-13 02:33:02,964 INFO L87 Difference]: Start difference. First operand 400 states and 431 transitions. Second operand has 93 states, 93 states have (on average 2.21505376344086) internal successors, (206), 78 states have internal predecessors, (206), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:33:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:12,721 INFO L93 Difference]: Finished difference Result 1276 states and 1429 transitions. [2021-11-13 02:33:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2021-11-13 02:33:12,722 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.21505376344086) internal successors, (206), 78 states have internal predecessors, (206), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 386 [2021-11-13 02:33:12,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:12,727 INFO L225 Difference]: With dead ends: 1276 [2021-11-13 02:33:12,727 INFO L226 Difference]: Without dead ends: 833 [2021-11-13 02:33:12,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1089 GetRequests, 722 SyntacticMatches, 0 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52546 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=21678, Invalid=114114, Unknown=0, NotChecked=0, Total=135792 [2021-11-13 02:33:12,740 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1428 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 723.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.46ms SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 847.38ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:12,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1428 Valid, 578 Invalid, 2013 Unknown, 0 Unchecked, 9.46ms Time], IncrementalHoareTripleChecker [415 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 847.38ms Time] [2021-11-13 02:33:12,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-13 02:33:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 535. [2021-11-13 02:33:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 516 states have (on average 1.0872093023255813) internal successors, (561), 516 states have internal predecessors, (561), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:33:12,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 580 transitions. [2021-11-13 02:33:12,795 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 580 transitions. Word has length 386 [2021-11-13 02:33:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:12,796 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 580 transitions. [2021-11-13 02:33:12,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.21505376344086) internal successors, (206), 78 states have internal predecessors, (206), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:33:12,796 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 580 transitions. [2021-11-13 02:33:12,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2021-11-13 02:33:12,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:12,802 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-13 02:33:12,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:13,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:13,027 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:33:13,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1707607354, now seen corresponding path program 12 times [2021-11-13 02:33:13,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:13,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438290030] [2021-11-13 02:33:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:13,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24391 backedges. 13910 proven. 323 refuted. 0 times theorem prover too weak. 10158 trivial. 0 not checked. [2021-11-13 02:33:13,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:13,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438290030] [2021-11-13 02:33:13,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438290030] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:13,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496383457] [2021-11-13 02:33:13,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:33:13,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:13,845 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:13,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 02:33:14,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:33:14,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:33:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 02:33:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 24391 backedges. 13444 proven. 1107 refuted. 0 times theorem prover too weak. 9840 trivial. 0 not checked. [2021-11-13 02:33:15,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24391 backedges. 13487 proven. 1064 refuted. 0 times theorem prover too weak. 9840 trivial. 0 not checked. [2021-11-13 02:33:22,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496383457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:22,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [654322226] [2021-11-13 02:33:22,158 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:33:22,158 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:22,158 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:33:22,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:22,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 44, 44] total 59 [2021-11-13 02:33:22,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859657038] [2021-11-13 02:33:22,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:22,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 02:33:22,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 02:33:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=3094, Unknown=0, NotChecked=0, Total=3422 [2021-11-13 02:33:22,163 INFO L87 Difference]: Start difference. First operand 535 states and 580 transitions. Second operand has 59 states, 59 states have (on average 2.3389830508474576) internal successors, (138), 51 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 02:33:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:25,194 INFO L93 Difference]: Finished difference Result 873 states and 963 transitions. [2021-11-13 02:33:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-13 02:33:25,195 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.3389830508474576) internal successors, (138), 51 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) Word has length 529 [2021-11-13 02:33:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:25,198 INFO L225 Difference]: With dead ends: 873 [2021-11-13 02:33:25,199 INFO L226 Difference]: Without dead ends: 541 [2021-11-13 02:33:25,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1034 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7143 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3881, Invalid=22201, Unknown=0, NotChecked=0, Total=26082 [2021-11-13 02:33:25,203 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 96 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 632.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 758.47ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:25,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 384 Invalid, 2344 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [12 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 758.47ms Time] [2021-11-13 02:33:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-13 02:33:25,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 541. [2021-11-13 02:33:25,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 522 states have (on average 1.078544061302682) internal successors, (563), 522 states have internal predecessors, (563), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:33:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 582 transitions. [2021-11-13 02:33:25,256 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 582 transitions. Word has length 529 [2021-11-13 02:33:25,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:25,256 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 582 transitions. [2021-11-13 02:33:25,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.3389830508474576) internal successors, (138), 51 states have internal predecessors, (138), 1 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (10), 10 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 02:33:25,257 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 582 transitions. [2021-11-13 02:33:25,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-11-13 02:33:25,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:25,263 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-13 02:33:25,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-13 02:33:25,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:25,477 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:33:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1573629830, now seen corresponding path program 13 times [2021-11-13 02:33:25,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:25,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335828162] [2021-11-13 02:33:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:25,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 25144 backedges. 15561 proven. 1477 refuted. 0 times theorem prover too weak. 8106 trivial. 0 not checked. [2021-11-13 02:33:26,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:26,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335828162] [2021-11-13 02:33:26,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335828162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:26,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437106953] [2021-11-13 02:33:26,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:33:26,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:26,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:26,513 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:26,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 02:33:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:26,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 02:33:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 25144 backedges. 15516 proven. 1520 refuted. 0 times theorem prover too weak. 8108 trivial. 0 not checked. [2021-11-13 02:33:27,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:35,347 INFO L134 CoverageAnalysis]: Checked inductivity of 25144 backedges. 15569 proven. 1467 refuted. 0 times theorem prover too weak. 8108 trivial. 0 not checked. [2021-11-13 02:33:35,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437106953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:35,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1746897882] [2021-11-13 02:33:35,354 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:33:35,355 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:35,356 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:33:35,356 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:35,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 49] total 55 [2021-11-13 02:33:35,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872930972] [2021-11-13 02:33:35,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:35,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 02:33:35,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:35,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 02:33:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 02:33:35,359 INFO L87 Difference]: Start difference. First operand 541 states and 582 transitions. Second operand has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:33:37,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:37,262 INFO L93 Difference]: Finished difference Result 846 states and 926 transitions. [2021-11-13 02:33:37,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-13 02:33:37,263 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 535 [2021-11-13 02:33:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:37,266 INFO L225 Difference]: With dead ends: 846 [2021-11-13 02:33:37,267 INFO L226 Difference]: Without dead ends: 544 [2021-11-13 02:33:37,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1068 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8137 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4277, Invalid=21163, Unknown=0, NotChecked=0, Total=25440 [2021-11-13 02:33:37,272 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 85 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 335.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.06ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 396.40ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:37,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 312 Invalid, 974 Unknown, 0 Unchecked, 3.06ms Time], IncrementalHoareTripleChecker [14 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 396.40ms Time] [2021-11-13 02:33:37,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-11-13 02:33:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2021-11-13 02:33:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 525 states have (on average 1.0704761904761906) internal successors, (562), 525 states have internal predecessors, (562), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 16 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 02:33:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 581 transitions. [2021-11-13 02:33:37,326 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 581 transitions. Word has length 535 [2021-11-13 02:33:37,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:37,327 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 581 transitions. [2021-11-13 02:33:37,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.418181818181818) internal successors, (133), 44 states have internal predecessors, (133), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:33:37,328 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 581 transitions. [2021-11-13 02:33:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-11-13 02:33:37,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:37,333 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 18, 17, 17, 17, 17, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-13 02:33:37,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:37,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 02:33:37,557 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:33:37,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:37,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1577367049, now seen corresponding path program 14 times [2021-11-13 02:33:37,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:37,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320715884] [2021-11-13 02:33:37,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:37,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:38,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25684 backedges. 12565 proven. 6875 refuted. 0 times theorem prover too weak. 6244 trivial. 0 not checked. [2021-11-13 02:33:38,662 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:38,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320715884] [2021-11-13 02:33:38,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320715884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:38,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759978228] [2021-11-13 02:33:38,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:33:38,663 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:38,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:38,673 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:38,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 02:33:39,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-13 02:33:39,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:33:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-13 02:33:39,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 25684 backedges. 10698 proven. 9898 refuted. 0 times theorem prover too weak. 5088 trivial. 0 not checked. [2021-11-13 02:33:40,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:46,693 INFO L134 CoverageAnalysis]: Checked inductivity of 25684 backedges. 10698 proven. 9898 refuted. 0 times theorem prover too weak. 5088 trivial. 0 not checked. [2021-11-13 02:33:46,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759978228] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:46,693 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214626821] [2021-11-13 02:33:46,695 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:33:46,695 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:46,696 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:33:46,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:46,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 36, 36] total 124 [2021-11-13 02:33:46,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636029957] [2021-11-13 02:33:46,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:46,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-11-13 02:33:46,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-11-13 02:33:46,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=13649, Unknown=0, NotChecked=0, Total=15252 [2021-11-13 02:33:46,700 INFO L87 Difference]: Start difference. First operand 544 states and 581 transitions. Second operand has 124 states, 124 states have (on average 2.217741935483871) internal successors, (275), 104 states have internal predecessors, (275), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-13 02:34:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:07,696 INFO L93 Difference]: Finished difference Result 2212 states and 2451 transitions. [2021-11-13 02:34:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 484 states. [2021-11-13 02:34:07,699 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.217741935483871) internal successors, (275), 104 states have internal predecessors, (275), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) Word has length 548 [2021-11-13 02:34:07,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:07,706 INFO L225 Difference]: With dead ends: 2212 [2021-11-13 02:34:07,707 INFO L226 Difference]: Without dead ends: 1511 [2021-11-13 02:34:07,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1587 GetRequests, 1032 SyntacticMatches, 0 SemanticMatches, 555 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141932 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=68190, Invalid=241502, Unknown=0, NotChecked=0, Total=309692 [2021-11-13 02:34:07,733 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2468 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 622.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2468 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.85ms SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 732.90ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:07,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2468 Valid, 360 Invalid, 1827 Unknown, 0 Unchecked, 7.85ms Time], IncrementalHoareTripleChecker [1127 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 732.90ms Time] [2021-11-13 02:34:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2021-11-13 02:34:07,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 853. [2021-11-13 02:34:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 828 states have (on average 1.0857487922705313) internal successors, (899), 828 states have internal predecessors, (899), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:34:07,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 924 transitions. [2021-11-13 02:34:07,834 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 924 transitions. Word has length 548 [2021-11-13 02:34:07,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:07,835 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 924 transitions. [2021-11-13 02:34:07,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.217741935483871) internal successors, (275), 104 states have internal predecessors, (275), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-13 02:34:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 924 transitions. [2021-11-13 02:34:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2021-11-13 02:34:07,848 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:07,848 INFO L514 BasicCegarLoop]: trace histogram [213, 213, 213, 24, 23, 23, 23, 23, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-13 02:34:07,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:08,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:08,057 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:34:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:08,057 INFO L85 PathProgramCache]: Analyzing trace with hash -770197975, now seen corresponding path program 15 times [2021-11-13 02:34:08,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:08,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171358894] [2021-11-13 02:34:08,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:08,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 74758 backedges. 41633 proven. 494 refuted. 0 times theorem prover too weak. 32631 trivial. 0 not checked. [2021-11-13 02:34:09,220 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:09,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171358894] [2021-11-13 02:34:09,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171358894] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:09,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747518433] [2021-11-13 02:34:09,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:34:09,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:09,226 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:09,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 02:34:09,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:34:09,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:34:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 2004 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-13 02:34:09,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 74758 backedges. 36680 proven. 2024 refuted. 0 times theorem prover too weak. 36054 trivial. 0 not checked. [2021-11-13 02:34:11,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 74758 backedges. 36744 proven. 1960 refuted. 0 times theorem prover too weak. 36054 trivial. 0 not checked. [2021-11-13 02:34:27,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747518433] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:27,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133818863] [2021-11-13 02:34:27,450 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:34:27,450 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:27,450 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:34:27,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:27,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 54, 54] total 73 [2021-11-13 02:34:27,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131165158] [2021-11-13 02:34:27,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:27,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 02:34:27,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 02:34:27,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=4777, Unknown=0, NotChecked=0, Total=5256 [2021-11-13 02:34:27,455 INFO L87 Difference]: Start difference. First operand 853 states and 924 transitions. Second operand has 73 states, 73 states have (on average 2.2739726027397262) internal successors, (166), 63 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 02:34:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:34:32,413 INFO L93 Difference]: Finished difference Result 1434 states and 1577 transitions. [2021-11-13 02:34:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2021-11-13 02:34:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.2739726027397262) internal successors, (166), 63 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 884 [2021-11-13 02:34:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:34:32,419 INFO L225 Difference]: With dead ends: 1434 [2021-11-13 02:34:32,419 INFO L226 Difference]: Without dead ends: 862 [2021-11-13 02:34:32,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1961 GetRequests, 1738 SyntacticMatches, 3 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14117 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7079, Invalid=41983, Unknown=0, NotChecked=0, Total=49062 [2021-11-13 02:34:32,426 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 111 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 3560 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 919.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.81ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 3560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1114.17ms IncrementalHoareTripleChecker+Time [2021-11-13 02:34:32,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 512 Invalid, 3572 Unknown, 0 Unchecked, 6.81ms Time], IncrementalHoareTripleChecker [12 Valid, 3560 Invalid, 0 Unknown, 0 Unchecked, 1114.17ms Time] [2021-11-13 02:34:32,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-13 02:34:32,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-11-13 02:34:32,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 837 states have (on average 1.076463560334528) internal successors, (901), 837 states have internal predecessors, (901), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:34:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 926 transitions. [2021-11-13 02:34:32,524 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 926 transitions. Word has length 884 [2021-11-13 02:34:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:34:32,525 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 926 transitions. [2021-11-13 02:34:32,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.2739726027397262) internal successors, (166), 63 states have internal predecessors, (166), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 02:34:32,526 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 926 transitions. [2021-11-13 02:34:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 887 [2021-11-13 02:34:32,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:34:32,537 INFO L514 BasicCegarLoop]: trace histogram [217, 217, 217, 22, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-13 02:34:32,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:34:32,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:32,761 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:34:32,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:34:32,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1797330711, now seen corresponding path program 16 times [2021-11-13 02:34:32,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:34:32,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339896748] [2021-11-13 02:34:32,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:34:32,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:34:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 77197 backedges. 43713 proven. 593 refuted. 0 times theorem prover too weak. 32891 trivial. 0 not checked. [2021-11-13 02:34:33,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:34:33,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339896748] [2021-11-13 02:34:33,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339896748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:34:33,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62248044] [2021-11-13 02:34:33,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:34:33,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:34:33,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:34:33,994 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:34:33,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 02:34:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:34:34,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 2014 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-13 02:34:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:34:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 77197 backedges. 42263 proven. 2628 refuted. 0 times theorem prover too weak. 32306 trivial. 0 not checked. [2021-11-13 02:34:36,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:56,030 INFO L134 CoverageAnalysis]: Checked inductivity of 77197 backedges. 42339 proven. 2552 refuted. 0 times theorem prover too weak. 32306 trivial. 0 not checked. [2021-11-13 02:34:56,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62248044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:56,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1317416939] [2021-11-13 02:34:56,032 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:34:56,033 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:56,033 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:34:56,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:56,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 59, 59] total 80 [2021-11-13 02:34:56,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365853786] [2021-11-13 02:34:56,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:56,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:34:56,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:34:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:34:56,037 INFO L87 Difference]: Start difference. First operand 862 states and 926 transitions. Second operand has 80 states, 80 states have (on average 2.25) internal successors, (180), 69 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:35:02,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:02,346 INFO L93 Difference]: Finished difference Result 1413 states and 1542 transitions. [2021-11-13 02:35:02,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-11-13 02:35:02,347 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.25) internal successors, (180), 69 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 886 [2021-11-13 02:35:02,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:02,352 INFO L225 Difference]: With dead ends: 1413 [2021-11-13 02:35:02,352 INFO L226 Difference]: Without dead ends: 871 [2021-11-13 02:35:02,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1995 GetRequests, 1739 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18981 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=9239, Invalid=55531, Unknown=0, NotChecked=0, Total=64770 [2021-11-13 02:35:02,363 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 126 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 4666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1227.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 4680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.78ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1471.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:02,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 700 Invalid, 4680 Unknown, 0 Unchecked, 8.78ms Time], IncrementalHoareTripleChecker [14 Valid, 4666 Invalid, 0 Unknown, 0 Unchecked, 1471.88ms Time] [2021-11-13 02:35:02,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-13 02:35:02,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2021-11-13 02:35:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 846 states have (on average 1.0685579196217494) internal successors, (904), 846 states have internal predecessors, (904), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:35:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 929 transitions. [2021-11-13 02:35:02,471 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 929 transitions. Word has length 886 [2021-11-13 02:35:02,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:02,472 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 929 transitions. [2021-11-13 02:35:02,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.25) internal successors, (180), 69 states have internal predecessors, (180), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 02:35:02,473 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 929 transitions. [2021-11-13 02:35:02,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 906 [2021-11-13 02:35:02,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:02,485 INFO L514 BasicCegarLoop]: trace histogram [220, 220, 220, 24, 23, 23, 23, 23, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1] [2021-11-13 02:35:02,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:02,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 02:35:02,709 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:35:02,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:02,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1614202170, now seen corresponding path program 17 times [2021-11-13 02:35:02,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:02,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389342483] [2021-11-13 02:35:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:02,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 79441 backedges. 45386 proven. 701 refuted. 0 times theorem prover too weak. 33354 trivial. 0 not checked. [2021-11-13 02:35:04,076 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:04,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389342483] [2021-11-13 02:35:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389342483] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:04,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582647079] [2021-11-13 02:35:04,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:35:04,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:04,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:04,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:04,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 02:35:05,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-13 02:35:05,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:05,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 02:35:05,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 79441 backedges. 38100 proven. 22725 refuted. 0 times theorem prover too weak. 18616 trivial. 0 not checked. [2021-11-13 02:35:07,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:35:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 79441 backedges. 38100 proven. 22725 refuted. 0 times theorem prover too weak. 18616 trivial. 0 not checked. [2021-11-13 02:35:17,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582647079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:35:17,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [733477091] [2021-11-13 02:35:17,131 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:35:17,131 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:35:17,131 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:35:17,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:35:17,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 45, 45] total 141 [2021-11-13 02:35:17,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75989592] [2021-11-13 02:35:17,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:35:17,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-11-13 02:35:17,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:35:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-11-13 02:35:17,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1737, Invalid=18003, Unknown=0, NotChecked=0, Total=19740 [2021-11-13 02:35:17,139 INFO L87 Difference]: Start difference. First operand 871 states and 929 transitions. Second operand has 141 states, 141 states have (on average 1.9645390070921986) internal successors, (277), 128 states have internal predecessors, (277), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:35:49,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:49,634 INFO L93 Difference]: Finished difference Result 4005 states and 4494 transitions. [2021-11-13 02:35:49,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 606 states. [2021-11-13 02:35:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.9645390070921986) internal successors, (277), 128 states have internal predecessors, (277), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 905 [2021-11-13 02:35:49,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:49,652 INFO L225 Difference]: With dead ends: 4005 [2021-11-13 02:35:49,652 INFO L226 Difference]: Without dead ends: 3030 [2021-11-13 02:35:49,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 1723 SyntacticMatches, 0 SemanticMatches, 740 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211380 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=51714, Invalid=498108, Unknown=0, NotChecked=0, Total=549822 [2021-11-13 02:35:49,701 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 4856 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 3435 mSolverCounterSat, 1280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1572.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4856 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 4715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.47ms SdHoareTripleChecker+Time, 1280 IncrementalHoareTripleChecker+Valid, 3435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1833.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:49,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4856 Valid, 794 Invalid, 4715 Unknown, 0 Unchecked, 16.47ms Time], IncrementalHoareTripleChecker [1280 Valid, 3435 Invalid, 0 Unknown, 0 Unchecked, 1833.98ms Time] [2021-11-13 02:35:49,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-11-13 02:35:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 1240. [2021-11-13 02:35:49,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1210 states have (on average 1.0834710743801652) internal successors, (1311), 1210 states have internal predecessors, (1311), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 02:35:49,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1341 transitions. [2021-11-13 02:35:49,972 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1341 transitions. Word has length 905 [2021-11-13 02:35:49,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:49,973 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1341 transitions. [2021-11-13 02:35:49,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.9645390070921986) internal successors, (277), 128 states have internal predecessors, (277), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:35:49,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1341 transitions. [2021-11-13 02:35:49,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1247 [2021-11-13 02:35:49,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:49,996 INFO L514 BasicCegarLoop]: trace histogram [319, 319, 319, 28, 27, 27, 27, 27, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1] [2021-11-13 02:35:50,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:50,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 02:35:50,221 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:35:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:50,221 INFO L85 PathProgramCache]: Analyzing trace with hash -494725687, now seen corresponding path program 18 times [2021-11-13 02:35:50,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:50,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171002185] [2021-11-13 02:35:50,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:50,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:50,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 163723 backedges. 61597 proven. 9531 refuted. 0 times theorem prover too weak. 92595 trivial. 0 not checked. [2021-11-13 02:35:52,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:52,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171002185] [2021-11-13 02:35:52,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171002185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:52,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135485728] [2021-11-13 02:35:52,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:35:52,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:52,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:52,229 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:52,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 02:35:53,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:35:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:53,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 2838 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-13 02:35:53,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 163723 backedges. 42225 proven. 2852 refuted. 0 times theorem prover too weak. 118646 trivial. 0 not checked. [2021-11-13 02:35:57,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 163723 backedges. 42225 proven. 2852 refuted. 0 times theorem prover too weak. 118646 trivial. 0 not checked. [2021-11-13 02:36:03,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135485728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:36:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061662513] [2021-11-13 02:36:03,843 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:36:03,843 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:36:03,844 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:36:03,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:36:03,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 56, 56] total 175 [2021-11-13 02:36:03,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229668970] [2021-11-13 02:36:03,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:36:03,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2021-11-13 02:36:03,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:03,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2021-11-13 02:36:03,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4137, Invalid=26313, Unknown=0, NotChecked=0, Total=30450 [2021-11-13 02:36:03,853 INFO L87 Difference]: Start difference. First operand 1240 states and 1341 transitions. Second operand has 175 states, 175 states have (on average 1.88) internal successors, (329), 160 states have internal predecessors, (329), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:36:29,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:29,789 INFO L93 Difference]: Finished difference Result 6690 states and 7934 transitions. [2021-11-13 02:36:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 487 states. [2021-11-13 02:36:29,789 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 1.88) internal successors, (329), 160 states have internal predecessors, (329), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 1246 [2021-11-13 02:36:29,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:29,810 INFO L225 Difference]: With dead ends: 6690 [2021-11-13 02:36:29,810 INFO L226 Difference]: Without dead ends: 5576 [2021-11-13 02:36:29,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2970 GetRequests, 2382 SyntacticMatches, 0 SemanticMatches, 588 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134066 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=85220, Invalid=262290, Unknown=0, NotChecked=0, Total=347510 [2021-11-13 02:36:29,842 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3227 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 1603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 834.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3227 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.26ms SdHoareTripleChecker+Time, 1603 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 971.15ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:29,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3227 Valid, 302 Invalid, 2453 Unknown, 0 Unchecked, 10.26ms Time], IncrementalHoareTripleChecker [1603 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 971.15ms Time] [2021-11-13 02:36:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5576 states. [2021-11-13 02:36:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5576 to 1477. [2021-11-13 02:36:30,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1447 states have (on average 1.10573600552868) internal successors, (1600), 1447 states have internal predecessors, (1600), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 02:36:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 1630 transitions. [2021-11-13 02:36:30,117 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 1630 transitions. Word has length 1246 [2021-11-13 02:36:30,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:30,117 INFO L470 AbstractCegarLoop]: Abstraction has 1477 states and 1630 transitions. [2021-11-13 02:36:30,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 1.88) internal successors, (329), 160 states have internal predecessors, (329), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:36:30,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 1630 transitions. [2021-11-13 02:36:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1453 [2021-11-13 02:36:30,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:30,141 INFO L514 BasicCegarLoop]: trace histogram [384, 384, 384, 29, 28, 28, 28, 28, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2021-11-13 02:36:30,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:30,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 02:36:30,361 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:36:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1103064268, now seen corresponding path program 19 times [2021-11-13 02:36:30,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:30,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496773062] [2021-11-13 02:36:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:30,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:31,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 234463 backedges. 124104 proven. 818 refuted. 0 times theorem prover too weak. 109541 trivial. 0 not checked. [2021-11-13 02:36:32,499 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:32,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496773062] [2021-11-13 02:36:32,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496773062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:36:32,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45296477] [2021-11-13 02:36:32,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:36:32,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:36:32,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:36:32,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:36:32,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 02:36:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:33,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 3316 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 02:36:33,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 234463 backedges. 106559 proven. 4172 refuted. 0 times theorem prover too weak. 123732 trivial. 0 not checked. [2021-11-13 02:36:36,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 234463 backedges. 106662 proven. 4069 refuted. 0 times theorem prover too weak. 123732 trivial. 0 not checked. [2021-11-13 02:37:13,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45296477] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:13,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547935884] [2021-11-13 02:37:13,788 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:37:13,788 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:37:13,788 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:37:13,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:37:13,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 69, 69] total 94 [2021-11-13 02:37:13,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479847052] [2021-11-13 02:37:13,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:13,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-13 02:37:13,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-13 02:37:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=7984, Unknown=0, NotChecked=0, Total=8742 [2021-11-13 02:37:13,803 INFO L87 Difference]: Start difference. First operand 1477 states and 1630 transitions. Second operand has 94 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 81 states have internal predecessors, (208), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:37:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:23,629 INFO L93 Difference]: Finished difference Result 2556 states and 2864 transitions. [2021-11-13 02:37:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-11-13 02:37:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 81 states have internal predecessors, (208), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) Word has length 1452 [2021-11-13 02:37:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:23,635 INFO L225 Difference]: With dead ends: 2556 [2021-11-13 02:37:23,635 INFO L226 Difference]: Without dead ends: 1492 [2021-11-13 02:37:23,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3193 GetRequests, 2865 SyntacticMatches, 3 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32153 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=14936, Invalid=91666, Unknown=0, NotChecked=0, Total=106602 [2021-11-13 02:37:23,645 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 151 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 6879 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1731.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 6896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.33ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 6879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2091.78ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:23,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 618 Invalid, 6896 Unknown, 0 Unchecked, 12.33ms Time], IncrementalHoareTripleChecker [17 Valid, 6879 Invalid, 0 Unknown, 0 Unchecked, 2091.78ms Time] [2021-11-13 02:37:23,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-11-13 02:37:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1492. [2021-11-13 02:37:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1462 states have (on average 1.0998632010943912) internal successors, (1608), 1462 states have internal predecessors, (1608), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 02:37:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 1638 transitions. [2021-11-13 02:37:23,837 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 1638 transitions. Word has length 1452 [2021-11-13 02:37:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:23,838 INFO L470 AbstractCegarLoop]: Abstraction has 1492 states and 1638 transitions. [2021-11-13 02:37:23,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 81 states have internal predecessors, (208), 1 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (15), 15 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-13 02:37:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 1638 transitions. [2021-11-13 02:37:23,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1468 [2021-11-13 02:37:23,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:23,862 INFO L514 BasicCegarLoop]: trace histogram [389, 389, 389, 29, 28, 28, 28, 28, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2021-11-13 02:37:23,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:24,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:24,077 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:37:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:24,077 INFO L85 PathProgramCache]: Analyzing trace with hash -444346205, now seen corresponding path program 20 times [2021-11-13 02:37:24,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:24,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536301794] [2021-11-13 02:37:24,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:24,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 240383 backedges. 128668 proven. 944 refuted. 0 times theorem prover too weak. 110771 trivial. 0 not checked. [2021-11-13 02:37:26,182 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:26,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536301794] [2021-11-13 02:37:26,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536301794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:26,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154121857] [2021-11-13 02:37:26,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:37:26,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:26,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:26,190 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:37:26,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 02:37:27,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-13 02:37:27,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 02:37:27,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 240383 backedges. 113067 proven. 77106 refuted. 0 times theorem prover too weak. 50210 trivial. 0 not checked. [2021-11-13 02:37:31,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:46,808 INFO L134 CoverageAnalysis]: Checked inductivity of 240383 backedges. 113067 proven. 77106 refuted. 0 times theorem prover too weak. 50210 trivial. 0 not checked. [2021-11-13 02:37:46,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154121857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:46,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137615310] [2021-11-13 02:37:46,811 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:37:46,811 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:37:46,811 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:37:46,812 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:37:46,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 52, 52] total 163 [2021-11-13 02:37:46,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497648322] [2021-11-13 02:37:46,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:46,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2021-11-13 02:37:46,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2021-11-13 02:37:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2289, Invalid=24117, Unknown=0, NotChecked=0, Total=26406 [2021-11-13 02:37:46,820 INFO L87 Difference]: Start difference. First operand 1492 states and 1638 transitions. Second operand has 163 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 148 states have internal predecessors, (317), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:38:36,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:36,625 INFO L93 Difference]: Finished difference Result 7620 states and 8698 transitions. [2021-11-13 02:38:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 789 states. [2021-11-13 02:38:36,626 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 148 states have internal predecessors, (317), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 1467 [2021-11-13 02:38:36,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:36,648 INFO L225 Difference]: With dead ends: 7620 [2021-11-13 02:38:36,648 INFO L226 Difference]: Without dead ends: 5608 [2021-11-13 02:38:36,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3778 GetRequests, 2833 SyntacticMatches, 0 SemanticMatches, 945 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354170 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=78837, Invalid=817025, Unknown=0, NotChecked=0, Total=895862 [2021-11-13 02:38:36,700 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 5016 mSDsluCounter, 1277 mSDsCounter, 0 mSdLazyCounter, 4105 mSolverCounterSat, 1984 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2153.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5016 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 6089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.96ms SdHoareTripleChecker+Time, 1984 IncrementalHoareTripleChecker+Valid, 4105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2516.01ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:36,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5016 Valid, 1279 Invalid, 6089 Unknown, 0 Unchecked, 21.96ms Time], IncrementalHoareTripleChecker [1984 Valid, 4105 Invalid, 0 Unknown, 0 Unchecked, 2516.01ms Time] [2021-11-13 02:38:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5608 states. [2021-11-13 02:38:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5608 to 1807. [2021-11-13 02:38:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1773 states have (on average 1.0992667794698252) internal successors, (1949), 1773 states have internal predecessors, (1949), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 31 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:38:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 1983 transitions. [2021-11-13 02:38:37,390 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 1983 transitions. Word has length 1467 [2021-11-13 02:38:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:37,391 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 1983 transitions. [2021-11-13 02:38:37,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 1.9447852760736197) internal successors, (317), 148 states have internal predecessors, (317), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:38:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 1983 transitions. [2021-11-13 02:38:37,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1700 [2021-11-13 02:38:37,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:37,450 INFO L514 BasicCegarLoop]: trace histogram [459, 459, 459, 31, 30, 30, 30, 30, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2021-11-13 02:38:37,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:37,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 02:38:37,664 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:38:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:37,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2039387171, now seen corresponding path program 21 times [2021-11-13 02:38:37,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:37,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662846081] [2021-11-13 02:38:37,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:37,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:40,147 INFO L134 CoverageAnalysis]: Checked inductivity of 332661 backedges. 108298 proven. 12896 refuted. 0 times theorem prover too weak. 211467 trivial. 0 not checked. [2021-11-13 02:38:40,147 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662846081] [2021-11-13 02:38:40,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662846081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:40,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143034533] [2021-11-13 02:38:40,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:38:40,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:38:40,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:38:40,154 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:38:40,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 02:38:42,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:38:42,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:38:42,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 3887 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-13 02:38:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 332661 backedges. 108337 proven. 12857 refuted. 0 times theorem prover too weak. 211467 trivial. 0 not checked. [2021-11-13 02:38:44,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 332661 backedges. 108337 proven. 12857 refuted. 0 times theorem prover too weak. 211467 trivial. 0 not checked. [2021-11-13 02:39:26,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143034533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:26,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098348942] [2021-11-13 02:39:26,377 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:39:26,377 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:39:26,377 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:39:26,379 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:39:26,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69, 69] total 72 [2021-11-13 02:39:26,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385539241] [2021-11-13 02:39:26,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:39:26,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-13 02:39:26,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:39:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-13 02:39:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=4540, Unknown=0, NotChecked=0, Total=5112 [2021-11-13 02:39:26,387 INFO L87 Difference]: Start difference. First operand 1807 states and 1983 transitions. Second operand has 72 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 58 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 02:39:32,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:32,183 INFO L93 Difference]: Finished difference Result 3201 states and 3551 transitions. [2021-11-13 02:39:32,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 228 states. [2021-11-13 02:39:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 58 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 1699 [2021-11-13 02:39:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:32,192 INFO L225 Difference]: With dead ends: 3201 [2021-11-13 02:39:32,193 INFO L226 Difference]: Without dead ends: 1807 [2021-11-13 02:39:32,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3675 GetRequests, 3409 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27473 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=13216, Invalid=58340, Unknown=0, NotChecked=0, Total=71556 [2021-11-13 02:39:32,208 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 510 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 306.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.35ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:32,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 232 Invalid, 585 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [70 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 348.35ms Time] [2021-11-13 02:39:32,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-11-13 02:39:32,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2021-11-13 02:39:32,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1773 states have (on average 1.098702763677383) internal successors, (1948), 1773 states have internal predecessors, (1948), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 31 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:39:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 1982 transitions. [2021-11-13 02:39:32,742 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 1982 transitions. Word has length 1699 [2021-11-13 02:39:32,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:32,743 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 1982 transitions. [2021-11-13 02:39:32,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.2916666666666665) internal successors, (165), 58 states have internal predecessors, (165), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2021-11-13 02:39:32,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 1982 transitions. [2021-11-13 02:39:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2021-11-13 02:39:32,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:32,775 INFO L514 BasicCegarLoop]: trace histogram [472, 472, 472, 30, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1] [2021-11-13 02:39:32,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:33,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 02:39:33,001 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:39:33,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:33,001 INFO L85 PathProgramCache]: Analyzing trace with hash 89437798, now seen corresponding path program 22 times [2021-11-13 02:39:33,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:39:33,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636733758] [2021-11-13 02:39:33,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:33,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:39:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:35,618 INFO L134 CoverageAnalysis]: Checked inductivity of 351652 backedges. 124113 proven. 17087 refuted. 0 times theorem prover too weak. 210452 trivial. 0 not checked. [2021-11-13 02:39:35,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:39:35,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636733758] [2021-11-13 02:39:35,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636733758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:39:35,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358765132] [2021-11-13 02:39:35,618 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:39:35,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:39:35,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:39:35,619 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:39:35,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 02:39:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:38,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 3983 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-13 02:39:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 351652 backedges. 124155 proven. 17045 refuted. 0 times theorem prover too weak. 210452 trivial. 0 not checked. [2021-11-13 02:39:40,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 351652 backedges. 124155 proven. 17045 refuted. 0 times theorem prover too weak. 210452 trivial. 0 not checked. [2021-11-13 02:40:29,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358765132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:29,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236597821] [2021-11-13 02:40:29,280 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:40:29,281 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:40:29,281 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:40:29,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:40:29,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 77 [2021-11-13 02:40:29,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297316745] [2021-11-13 02:40:29,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:40:29,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-13 02:40:29,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:40:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-13 02:40:29,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=5202, Unknown=0, NotChecked=0, Total=5852 [2021-11-13 02:40:29,288 INFO L87 Difference]: Start difference. First operand 1807 states and 1982 transitions. Second operand has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 62 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:40:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:36,163 INFO L93 Difference]: Finished difference Result 3150 states and 3498 transitions. [2021-11-13 02:40:36,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2021-11-13 02:40:36,163 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 62 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) Word has length 1739 [2021-11-13 02:40:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:36,171 INFO L225 Difference]: With dead ends: 3150 [2021-11-13 02:40:36,171 INFO L226 Difference]: Without dead ends: 1807 [2021-11-13 02:40:36,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3790 GetRequests, 3490 SyntacticMatches, 0 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36118 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=16982, Invalid=73920, Unknown=0, NotChecked=0, Total=90902 [2021-11-13 02:40:36,186 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 757 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 332.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 757 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.46ms SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 377.63ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:36,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [757 Valid, 221 Invalid, 658 Unknown, 0 Unchecked, 3.46ms Time], IncrementalHoareTripleChecker [91 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 377.63ms Time] [2021-11-13 02:40:36,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-11-13 02:40:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 1807. [2021-11-13 02:40:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1773 states have (on average 1.0981387478849407) internal successors, (1947), 1773 states have internal predecessors, (1947), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 31 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:40:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 1981 transitions. [2021-11-13 02:40:36,676 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 1981 transitions. Word has length 1739 [2021-11-13 02:40:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:36,677 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 1981 transitions. [2021-11-13 02:40:36,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2857142857142856) internal successors, (176), 62 states have internal predecessors, (176), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 02:40:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 1981 transitions. [2021-11-13 02:40:36,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1803 [2021-11-13 02:40:36,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:36,719 INFO L514 BasicCegarLoop]: trace histogram [486, 486, 486, 33, 32, 32, 32, 32, 30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2021-11-13 02:40:36,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:36,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:40:36,945 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:40:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:36,945 INFO L85 PathProgramCache]: Analyzing trace with hash -25060532, now seen corresponding path program 23 times [2021-11-13 02:40:36,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:40:36,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509230453] [2021-11-13 02:40:36,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:36,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:40:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 373270 backedges. 200283 proven. 1079 refuted. 0 times theorem prover too weak. 171908 trivial. 0 not checked. [2021-11-13 02:40:40,381 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:40:40,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509230453] [2021-11-13 02:40:40,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509230453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:40:40,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674771849] [2021-11-13 02:40:40,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:40:40,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:40:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:40:40,383 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:40:40,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 02:40:43,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-11-13 02:40:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:40:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 02:40:43,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 373270 backedges. 179175 proven. 114154 refuted. 0 times theorem prover too weak. 79941 trivial. 0 not checked. [2021-11-13 02:40:49,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 373270 backedges. 179175 proven. 114154 refuted. 0 times theorem prover too weak. 79941 trivial. 0 not checked. [2021-11-13 02:41:10,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674771849] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:41:10,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379200157] [2021-11-13 02:41:10,357 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:41:10,357 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:41:10,358 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 02:41:10,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:41:10,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 57, 57] total 177 [2021-11-13 02:41:10,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500000825] [2021-11-13 02:41:10,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:41:10,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2021-11-13 02:41:10,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:41:10,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2021-11-13 02:41:10,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2662, Invalid=28490, Unknown=0, NotChecked=0, Total=31152 [2021-11-13 02:41:10,368 INFO L87 Difference]: Start difference. First operand 1807 states and 1981 transitions. Second operand has 177 states, 177 states have (on average 1.9491525423728813) internal successors, (345), 160 states have internal predecessors, (345), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-13 02:42:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:15,032 INFO L93 Difference]: Finished difference Result 8761 states and 10013 transitions. [2021-11-13 02:42:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 940 states. [2021-11-13 02:42:15,032 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.9491525423728813) internal successors, (345), 160 states have internal predecessors, (345), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) Word has length 1802 [2021-11-13 02:42:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:15,054 INFO L225 Difference]: With dead ends: 8761 [2021-11-13 02:42:15,055 INFO L226 Difference]: Without dead ends: 6380 [2021-11-13 02:42:15,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4603 GetRequests, 3493 SyntacticMatches, 0 SemanticMatches, 1110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498700 ImplicationChecksByTransitivity, 65.3s TimeCoverageRelationStatistics Valid=103701, Invalid=1131731, Unknown=0, NotChecked=0, Total=1235432 [2021-11-13 02:42:15,125 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 8586 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 4360 mSolverCounterSat, 2290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2442.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8586 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 6650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.47ms SdHoareTripleChecker+Time, 2290 IncrementalHoareTripleChecker+Valid, 4360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2829.09ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:15,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8586 Valid, 1001 Invalid, 6650 Unknown, 0 Unchecked, 26.47ms Time], IncrementalHoareTripleChecker [2290 Valid, 4360 Invalid, 0 Unknown, 0 Unchecked, 2829.09ms Time] [2021-11-13 02:42:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6380 states. [2021-11-13 02:42:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6380 to 2068. [2021-11-13 02:42:15,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2068 states, 2031 states have (on average 1.0965041851304775) internal successors, (2227), 2031 states have internal predecessors, (2227), 3 states have call successors, (3), 2 states have call predecessors, (3), 33 states have return successors, (34), 34 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-13 02:42:15,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2264 transitions. [2021-11-13 02:42:15,919 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2264 transitions. Word has length 1802 [2021-11-13 02:42:15,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:15,920 INFO L470 AbstractCegarLoop]: Abstraction has 2068 states and 2264 transitions. [2021-11-13 02:42:15,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.9491525423728813) internal successors, (345), 160 states have internal predecessors, (345), 1 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (19), 19 states have call predecessors, (19), 1 states have call successors, (19) [2021-11-13 02:42:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2264 transitions. [2021-11-13 02:42:16,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2023 [2021-11-13 02:42:16,138 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:16,139 INFO L514 BasicCegarLoop]: trace histogram [552, 552, 552, 35, 34, 34, 34, 34, 32, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1] [2021-11-13 02:42:16,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:16,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-13 02:42:16,357 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:42:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:16,358 INFO L85 PathProgramCache]: Analyzing trace with hash 438883308, now seen corresponding path program 24 times [2021-11-13 02:42:16,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:42:16,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019124340] [2021-11-13 02:42:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:16,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:42:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 479710 backedges. 166201 proven. 22230 refuted. 0 times theorem prover too weak. 291279 trivial. 0 not checked. [2021-11-13 02:42:21,009 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:42:21,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019124340] [2021-11-13 02:42:21,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019124340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:42:21,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486848082] [2021-11-13 02:42:21,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:42:21,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:42:21,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:42:21,012 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:42:21,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58889c39-f0be-42b2-aaab-976f29c11647/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 02:42:24,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:42:24,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:42:24,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 4630 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 02:42:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 479710 backedges. 166246 proven. 22185 refuted. 0 times theorem prover too weak. 291279 trivial. 0 not checked. [2021-11-13 02:42:27,629 INFO L328 TraceCheckSpWp]: Computing backward predicates...