./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter1.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_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/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_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/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_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/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 de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:28:50,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:28:50,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:28:50,236 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:28:50,237 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:28:50,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:28:50,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:28:50,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:28:50,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:28:50,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:28:50,250 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:28:50,252 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:28:50,253 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:28:50,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:28:50,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:28:50,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:28:50,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:28:50,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:28:50,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:28:50,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:28:50,310 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:28:50,312 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:28:50,314 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:28:50,315 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:28:50,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:28:50,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:28:50,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:28:50,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:28:50,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:28:50,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:28:50,331 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:28:50,332 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:28:50,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:28:50,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:28:50,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:28:50,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:28:50,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:28:50,341 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:28:50,341 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:28:50,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:28:50,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:28:50,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-13 02:28:50,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:28:50,406 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:28:50,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:28:50,408 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:28:50,408 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:28:50,409 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:28:50,409 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:28:50,409 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:28:50,418 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:28:50,418 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:28:50,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:28:50,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:28:50,420 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:28:50,421 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:28:50,421 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:28:50,421 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:28:50,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:28:50,423 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 02:28:50,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:28:50,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:28:50,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:28:50,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:28:50,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:28:50,424 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-13 02:28:50,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:28:50,425 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:28:50,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:28:50,426 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:28:50,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:28:50,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:50,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:28:50,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:28:50,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:28:50,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:28:50,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:28:50,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:28:50,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:28:50,431 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:28:50,431 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_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de5b7f1cccf5c7fe435559014125bbfd73538586d5303d45f8d606cb31a4b74b [2021-11-13 02:28:50,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:28:50,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:28:50,771 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:28:50,773 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:28:50,774 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:28:50,776 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-11-13 02:28:50,859 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/data/b27f18a94/08fb2e3afd0f483a835eae606c6e7d38/FLAG347cb3397 [2021-11-13 02:28:51,480 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:28:51,481 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/sv-benchmarks/c/termination-numeric/rec_counter1.c [2021-11-13 02:28:51,494 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/data/b27f18a94/08fb2e3afd0f483a835eae606c6e7d38/FLAG347cb3397 [2021-11-13 02:28:51,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/data/b27f18a94/08fb2e3afd0f483a835eae606c6e7d38 [2021-11-13 02:28:51,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:28:51,829 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:28:51,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:51,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:28:51,836 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:28:51,837 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:51" (1/1) ... [2021-11-13 02:28:51,839 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d8f6bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:51, skipping insertion in model container [2021-11-13 02:28:51,839 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:28:51" (1/1) ... [2021-11-13 02:28:51,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:28:51,864 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:28:52,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:52,048 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:28:52,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:28:52,076 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:28:52,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52 WrapperNode [2021-11-13 02:28:52,077 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:28:52,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:52,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:28:52,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:28:52,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:28:52,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:28:52,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:28:52,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:28:52,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,124 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,125 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,139 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,148 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:28:52,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:28:52,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:28:52,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:28:52,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (1/1) ... [2021-11-13 02:28:52,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:28:52,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:52,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:28:52,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:28:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2021-11-13 02:28:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2021-11-13 02:28:52,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:28:52,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:28:52,548 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:28:52,548 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 02:28:52,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:52 BoogieIcfgContainer [2021-11-13 02:28:52,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:28:52,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:28:52,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:28:52,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:28:52,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:28:51" (1/3) ... [2021-11-13 02:28:52,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336a7dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:52, skipping insertion in model container [2021-11-13 02:28:52,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:28:52" (2/3) ... [2021-11-13 02:28:52,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336a7dee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:28:52, skipping insertion in model container [2021-11-13 02:28:52,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:28:52" (3/3) ... [2021-11-13 02:28:52,562 INFO L111 eAbstractionObserver]: Analyzing ICFG rec_counter1.c [2021-11-13 02:28:52,569 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:28:52,569 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-13 02:28:52,630 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:28:52,639 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 02:28:52,640 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-13 02:28:52,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.6) internal successors, (24), 21 states have internal predecessors, (24), 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 02:28:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 02:28:52,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:52,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 02:28:52,668 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:52,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1967217591, now seen corresponding path program 1 times [2021-11-13 02:28:52,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:52,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317655583] [2021-11-13 02:28:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:52,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:52,864 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 02:28:52,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:52,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317655583] [2021-11-13 02:28:52,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317655583] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:52,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:52,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:52,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393706106] [2021-11-13 02:28:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:52,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:52,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:52,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:52,941 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.6) internal successors, (24), 21 states have internal predecessors, (24), 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 02:28:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:53,039 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-13 02:28:53,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:53,042 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 02:28:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:53,052 INFO L225 Difference]: With dead ends: 25 [2021-11-13 02:28:53,052 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 02:28:53,056 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 02:28:53,062 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.51ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:53,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 51.51ms Time] [2021-11-13 02:28:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 02:28:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 02:28:53,165 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 02:28:53,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-11-13 02:28:53,169 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2021-11-13 02:28:53,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:53,169 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-11-13 02:28:53,170 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 02:28:53,170 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-11-13 02:28:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 02:28:53,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:53,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:53,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 02:28:53,172 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:53,173 INFO L85 PathProgramCache]: Analyzing trace with hash -854203139, now seen corresponding path program 1 times [2021-11-13 02:28:53,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:53,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323883477] [2021-11-13 02:28:53,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:53,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:53,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:53,224 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 02:28:53,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:53,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323883477] [2021-11-13 02:28:53,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323883477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:53,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:53,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 02:28:53,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016973298] [2021-11-13 02:28:53,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:53,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:53,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:53,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:53,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:53,230 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 02:28:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:53,326 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-13 02:28:53,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:53,327 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 02:28:53,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:53,328 INFO L225 Difference]: With dead ends: 41 [2021-11-13 02:28:53,329 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 02:28:53,330 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 02:28:53,332 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.25ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 64.85ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:53,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 3.25ms Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 64.85ms Time] [2021-11-13 02:28:53,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 02:28:53,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-11-13 02:28:53,344 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 02:28:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-11-13 02:28:53,346 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2021-11-13 02:28:53,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:53,347 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-11-13 02:28:53,348 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 02:28:53,348 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-11-13 02:28:53,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:28:53,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:53,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:53,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 02:28:53,351 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash -589186252, now seen corresponding path program 1 times [2021-11-13 02:28:53,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:53,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017651292] [2021-11-13 02:28:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:53,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:53,469 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 02:28:53,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:53,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017651292] [2021-11-13 02:28:53,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017651292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:53,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591232214] [2021-11-13 02:28:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:53,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:53,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:53,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:53,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 02:28:53,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:53,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:28:53,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:53,668 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 02:28:53,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:53,818 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 02:28:53,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591232214] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:53,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1911862670] [2021-11-13 02:28:53,859 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-13 02:28:53,859 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:28:53,866 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 02:28:53,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:28:53,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-13 02:28:53,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598883908] [2021-11-13 02:28:53,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:28:53,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:28:53,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:53,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:28:53,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:28:53,891 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 02:28:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:54,065 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-13 02:28:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:28:54,066 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 02:28:54,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:54,072 INFO L225 Difference]: With dead ends: 38 [2021-11-13 02:28:54,072 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 02:28:54,075 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 02:28:54,080 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 140 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.14ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:54,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 59 Invalid, 66 Unknown, 0 Unchecked, 4.14ms Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 113.92ms Time] [2021-11-13 02:28:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 02:28:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2021-11-13 02:28:54,104 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 02:28:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-11-13 02:28:54,112 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 12 [2021-11-13 02:28:54,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:54,113 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-11-13 02:28:54,114 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 02:28:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-11-13 02:28:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:28:54,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:54,117 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:54,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:54,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:54,331 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1079336362, now seen corresponding path program 1 times [2021-11-13 02:28:54,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:54,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748891141] [2021-11-13 02:28:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:54,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:54,400 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 02:28:54,400 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748891141] [2021-11-13 02:28:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748891141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:54,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:54,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 02:28:54,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768121974] [2021-11-13 02:28:54,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:54,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:28:54,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:54,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:28:54,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 02:28:54,403 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 02:28:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:54,443 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2021-11-13 02:28:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:54,444 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 02:28:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:54,445 INFO L225 Difference]: With dead ends: 55 [2021-11-13 02:28:54,446 INFO L226 Difference]: Without dead ends: 37 [2021-11-13 02:28:54,446 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 02:28:54,448 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.28ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.83ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:54,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 73 Invalid, 15 Unknown, 0 Unchecked, 1.28ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 30.83ms Time] [2021-11-13 02:28:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-13 02:28:54,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-13 02:28:54,458 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 02:28:54,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-13 02:28:54,460 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2021-11-13 02:28:54,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:54,461 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-13 02:28:54,461 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 02:28:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-13 02:28:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 02:28:54,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:54,462 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:54,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 02:28:54,463 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:54,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1079337361, now seen corresponding path program 1 times [2021-11-13 02:28:54,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:54,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456890807] [2021-11-13 02:28:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:54,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:54,503 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 02:28:54,504 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:54,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456890807] [2021-11-13 02:28:54,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456890807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:54,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:54,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 02:28:54,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654232100] [2021-11-13 02:28:54,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:54,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:28:54,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:54,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:28:54,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:28:54,507 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 02:28:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:54,566 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-11-13 02:28:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:28:54,571 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 02:28:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:54,578 INFO L225 Difference]: With dead ends: 53 [2021-11-13 02:28:54,579 INFO L226 Difference]: Without dead ends: 52 [2021-11-13 02:28:54,580 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 02:28:54,584 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:54,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 39.95ms Time] [2021-11-13 02:28:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-13 02:28:54,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2021-11-13 02:28:54,613 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 02:28:54,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-11-13 02:28:54,617 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 15 [2021-11-13 02:28:54,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:54,617 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-11-13 02:28:54,618 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 02:28:54,618 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-11-13 02:28:54,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 02:28:54,619 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:54,619 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:28:54,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 02:28:54,619 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash -900280117, now seen corresponding path program 1 times [2021-11-13 02:28:54,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:54,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323420027] [2021-11-13 02:28:54,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:54,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:54,655 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 02:28:54,655 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:54,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323420027] [2021-11-13 02:28:54,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323420027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:54,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:54,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:28:54,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948318683] [2021-11-13 02:28:54,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:54,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:54,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:54,658 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 02:28:54,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:54,671 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2021-11-13 02:28:54,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:54,672 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 02:28:54,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:54,673 INFO L225 Difference]: With dead ends: 41 [2021-11-13 02:28:54,673 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 02:28:54,674 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 02:28:54,675 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:54,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 6.87ms Time] [2021-11-13 02:28:54,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 02:28:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-13 02:28:54,683 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 02:28:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-11-13 02:28:54,685 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2021-11-13 02:28:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:54,685 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-11-13 02:28:54,686 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 02:28:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-11-13 02:28:54,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 02:28:54,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:54,687 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 02:28:54,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 02:28:54,688 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:54,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1389552199, now seen corresponding path program 1 times [2021-11-13 02:28:54,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:54,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672889335] [2021-11-13 02:28:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:54,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:54,813 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 02:28:54,813 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:54,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672889335] [2021-11-13 02:28:54,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672889335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:54,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303239599] [2021-11-13 02:28:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:54,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:54,831 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:54,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 02:28:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:54,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 02:28:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:55,087 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 02:28:55,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:55,313 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 02:28:55,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303239599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:55,314 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:28:55,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8] total 18 [2021-11-13 02:28:55,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249609627] [2021-11-13 02:28:55,315 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:55,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 02:28:55,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 02:28:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:28:55,320 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 02:28:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:55,440 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-11-13 02:28:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 02:28:55,440 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 02:28:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:55,445 INFO L225 Difference]: With dead ends: 36 [2021-11-13 02:28:55,445 INFO L226 Difference]: Without dead ends: 35 [2021-11-13 02:28:55,446 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 02:28:55,449 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.88ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:55,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 65 Invalid, 51 Unknown, 0 Unchecked, 2.88ms Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 37.54ms Time] [2021-11-13 02:28:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-13 02:28:55,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-13 02:28:55,471 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 02:28:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-11-13 02:28:55,481 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2021-11-13 02:28:55,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:55,482 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-11-13 02:28:55,483 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 02:28:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-11-13 02:28:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 02:28:55,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:55,485 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 02:28:55,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:55,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 02:28:55,703 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:55,704 INFO L85 PathProgramCache]: Analyzing trace with hash 126445262, now seen corresponding path program 1 times [2021-11-13 02:28:55,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:55,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334853068] [2021-11-13 02:28:55,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:55,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:55,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:55,772 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 02:28:55,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:55,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334853068] [2021-11-13 02:28:55,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334853068] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 02:28:55,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:28:55,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 02:28:55,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456284750] [2021-11-13 02:28:55,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:28:55,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:28:55,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:28:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:28:55,775 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 02:28:55,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:55,800 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-13 02:28:55,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:28:55,801 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 02:28:55,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:55,802 INFO L225 Difference]: With dead ends: 35 [2021-11-13 02:28:55,802 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 02:28:55,803 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 02:28:55,804 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.33ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.05ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:55,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 7 Unknown, 0 Unchecked, 0.33ms Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 21.05ms Time] [2021-11-13 02:28:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 02:28:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-13 02:28:55,816 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 02:28:55,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-13 02:28:55,817 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2021-11-13 02:28:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:55,818 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-13 02:28:55,818 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 02:28:55,818 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-13 02:28:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 02:28:55,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:55,820 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 02:28:55,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 02:28:55,820 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:55,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:55,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1254815063, now seen corresponding path program 1 times [2021-11-13 02:28:55,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:55,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684692751] [2021-11-13 02:28:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:55,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:55,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:55,902 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 02:28:55,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:55,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684692751] [2021-11-13 02:28:55,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684692751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:55,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762378769] [2021-11-13 02:28:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:55,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:55,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:55,904 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:55,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 02:28:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:28:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:56,072 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 02:28:56,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:56,293 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 02:28:56,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762378769] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:56,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1167147300] [2021-11-13 02:28:56,298 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:28:56,298 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:28:56,299 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 02:28:56,300 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:28:56,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2021-11-13 02:28:56,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415404519] [2021-11-13 02:28:56,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:28:56,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:28:56,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:56,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:28:56,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:28:56,303 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 02:28:56,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:56,461 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-11-13 02:28:56,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 02:28:56,461 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 02:28:56,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:56,466 INFO L225 Difference]: With dead ends: 73 [2021-11-13 02:28:56,466 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 02:28:56,467 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 02:28:56,471 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.08ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:56,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 69 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 78.08ms Time] [2021-11-13 02:28:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 02:28:56,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-11-13 02:28:56,490 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 02:28:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-13 02:28:56,497 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 29 [2021-11-13 02:28:56,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:56,498 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-13 02:28:56,498 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 02:28:56,498 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-13 02:28:56,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 02:28:56,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:56,501 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 02:28:56,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:56,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:56,723 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:56,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash 532392663, now seen corresponding path program 2 times [2021-11-13 02:28:56,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:56,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426478563] [2021-11-13 02:28:56,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:56,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:56,859 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 02:28:56,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:56,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426478563] [2021-11-13 02:28:56,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426478563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:56,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050442715] [2021-11-13 02:28:56,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:28:56,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:56,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:56,861 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:56,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 02:28:56,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 02:28:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:28:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:28:56,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:57,068 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 02:28:57,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:57,287 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 02:28:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050442715] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:57,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699589594] [2021-11-13 02:28:57,291 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:28:57,291 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:28:57,291 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 02:28:57,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:28:57,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 21 [2021-11-13 02:28:57,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65117432] [2021-11-13 02:28:57,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:28:57,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 02:28:57,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:57,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 02:28:57,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-11-13 02:28:57,297 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 02:28:57,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:57,682 INFO L93 Difference]: Finished difference Result 119 states and 145 transitions. [2021-11-13 02:28:57,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 02:28:57,682 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 02:28:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:57,684 INFO L225 Difference]: With dead ends: 119 [2021-11-13 02:28:57,684 INFO L226 Difference]: Without dead ends: 83 [2021-11-13 02:28:57,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:28:57,688 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.08ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:57,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 179 Invalid, 191 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [16 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 112.08ms Time] [2021-11-13 02:28:57,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-13 02:28:57,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-11-13 02:28:57,700 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 02:28:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-13 02:28:57,701 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 57 [2021-11-13 02:28:57,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:57,702 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-13 02:28:57,702 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 02:28:57,703 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-13 02:28:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-13 02:28:57,706 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:57,707 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-11-13 02:28:57,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:57,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 02:28:57,927 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:57,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash -938496574, now seen corresponding path program 3 times [2021-11-13 02:28:57,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:57,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865582887] [2021-11-13 02:28:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:57,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:28:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-13 02:28:58,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:28:58,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865582887] [2021-11-13 02:28:58,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865582887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:28:58,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358122625] [2021-11-13 02:28:58,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:28:58,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:58,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:28:58,133 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:28:58,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 02:28:58,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:28:58,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:28:58,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 02:28:58,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:28:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-13 02:28:58,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:28:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 12 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-13 02:28:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358122625] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:28:58,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95869946] [2021-11-13 02:28:58,926 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:28:58,926 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:28:58,927 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 02:28:58,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:28:58,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 28 [2021-11-13 02:28:58,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99822505] [2021-11-13 02:28:58,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:28:58,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 02:28:58,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:28:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 02:28:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-11-13 02:28:58,930 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 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 02:28:59,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:28:59,598 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-13 02:28:59,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-13 02:28:59,599 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 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 76 [2021-11-13 02:28:59,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:28:59,601 INFO L225 Difference]: With dead ends: 124 [2021-11-13 02:28:59,601 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 02:28:59,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=729, Invalid=2133, Unknown=0, NotChecked=0, Total=2862 [2021-11-13 02:28:59,605 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 138.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.74ms SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.02ms IncrementalHoareTripleChecker+Time [2021-11-13 02:28:59,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 147 Invalid, 219 Unknown, 0 Unchecked, 3.74ms Time], IncrementalHoareTripleChecker [70 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 174.02ms Time] [2021-11-13 02:28:59,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 02:28:59,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 106. [2021-11-13 02:28:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.134020618556701) internal successors, (110), 97 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 6 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 02:28:59,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2021-11-13 02:28:59,634 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 76 [2021-11-13 02:28:59,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:28:59,635 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2021-11-13 02:28:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.392857142857143) internal successors, (67), 25 states have internal predecessors, (67), 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 02:28:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2021-11-13 02:28:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-13 02:28:59,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:28:59,644 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 8, 7, 7, 7, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-11-13 02:28:59,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:28:59,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:28:59,869 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:28:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:28:59,869 INFO L85 PathProgramCache]: Analyzing trace with hash 737716276, now seen corresponding path program 4 times [2021-11-13 02:28:59,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:28:59,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845356427] [2021-11-13 02:28:59,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:28:59,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:28:59,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:00,179 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 02:29:00,179 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:00,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845356427] [2021-11-13 02:29:00,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845356427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:00,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161543861] [2021-11-13 02:29:00,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:29:00,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:00,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:00,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:00,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 02:29:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 02:29:00,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 12 proven. 255 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 02:29:00,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 12 proven. 255 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 02:29:01,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161543861] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:01,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522344181] [2021-11-13 02:29:01,699 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:01,700 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:01,700 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 02:29:01,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:01,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 31 [2021-11-13 02:29:01,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868077560] [2021-11-13 02:29:01,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:01,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 02:29:01,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:01,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 02:29:01,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-11-13 02:29:01,705 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 23 states have internal predecessors, (82), 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 02:29:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:02,250 INFO L93 Difference]: Finished difference Result 459 states and 528 transitions. [2021-11-13 02:29:02,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-13 02:29:02,251 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 23 states have internal predecessors, (82), 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 108 [2021-11-13 02:29:02,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:02,255 INFO L225 Difference]: With dead ends: 459 [2021-11-13 02:29:02,256 INFO L226 Difference]: Without dead ends: 338 [2021-11-13 02:29:02,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 02:29:02,261 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 111 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:02,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 146 Invalid, 114 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [13 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 113.37ms Time] [2021-11-13 02:29:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-13 02:29:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 166. [2021-11-13 02:29:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 152 states have (on average 1.118421052631579) internal successors, (170), 152 states have internal predecessors, (170), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 11 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 02:29:02,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2021-11-13 02:29:02,282 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 108 [2021-11-13 02:29:02,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:02,283 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2021-11-13 02:29:02,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 23 states have internal predecessors, (82), 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 02:29:02,283 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2021-11-13 02:29:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-13 02:29:02,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:02,287 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-13 02:29:02,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:02,503 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash 193886619, now seen corresponding path program 5 times [2021-11-13 02:29:02,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:02,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705584304] [2021-11-13 02:29:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:02,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 791 proven. 26 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2021-11-13 02:29:02,767 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:02,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705584304] [2021-11-13 02:29:02,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705584304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:02,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108183117] [2021-11-13 02:29:02,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:29:02,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:02,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:02,768 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:02,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 02:29:02,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-13 02:29:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:02,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 02:29:02,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 617 proven. 162 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-13 02:29:03,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1495 backedges. 617 proven. 162 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2021-11-13 02:29:04,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108183117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:04,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2088900037] [2021-11-13 02:29:04,623 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:04,623 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:04,624 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 02:29:04,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:04,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2021-11-13 02:29:04,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195048591] [2021-11-13 02:29:04,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:04,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-13 02:29:04,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:04,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-13 02:29:04,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 02:29:04,630 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 02:29:07,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:07,226 INFO L93 Difference]: Finished difference Result 737 states and 853 transitions. [2021-11-13 02:29:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-13 02:29:07,227 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 183 [2021-11-13 02:29:07,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:07,232 INFO L225 Difference]: With dead ends: 737 [2021-11-13 02:29:07,232 INFO L226 Difference]: Without dead ends: 561 [2021-11-13 02:29:07,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1764, Invalid=9366, Unknown=0, NotChecked=0, Total=11130 [2021-11-13 02:29:07,240 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 412 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 352.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.86ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 414.13ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:07,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 286 Invalid, 586 Unknown, 0 Unchecked, 7.86ms Time], IncrementalHoareTripleChecker [104 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 414.13ms Time] [2021-11-13 02:29:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-11-13 02:29:07,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 204. [2021-11-13 02:29:07,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 189 states have (on average 1.1111111111111112) internal successors, (210), 189 states have internal predecessors, (210), 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 02:29:07,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2021-11-13 02:29:07,276 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 183 [2021-11-13 02:29:07,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:07,277 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2021-11-13 02:29:07,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 32 states have internal predecessors, (93), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 02:29:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2021-11-13 02:29:07,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-13 02:29:07,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:07,281 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-13 02:29:07,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:07,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 02:29:07,495 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:07,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:07,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1061120542, now seen corresponding path program 6 times [2021-11-13 02:29:07,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:07,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680222158] [2021-11-13 02:29:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:07,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1308 proven. 53 refuted. 0 times theorem prover too weak. 953 trivial. 0 not checked. [2021-11-13 02:29:07,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680222158] [2021-11-13 02:29:07,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680222158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:07,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426199778] [2021-11-13 02:29:07,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:29:07,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:07,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:07,828 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:07,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 02:29:07,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:29:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:07,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 02:29:07,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:08,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1018 proven. 92 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-11-13 02:29:08,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:10,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 1026 proven. 84 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2021-11-13 02:29:10,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426199778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:10,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1776842381] [2021-11-13 02:29:10,274 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:10,274 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:10,274 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 02:29:10,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:10,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 24 [2021-11-13 02:29:10,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785644971] [2021-11-13 02:29:10,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:10,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 02:29:10,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 02:29:10,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:29:10,278 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 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 02:29:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:11,024 INFO L93 Difference]: Finished difference Result 408 states and 453 transitions. [2021-11-13 02:29:11,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 02:29:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 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 210 [2021-11-13 02:29:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:11,027 INFO L225 Difference]: With dead ends: 408 [2021-11-13 02:29:11,027 INFO L226 Difference]: Without dead ends: 253 [2021-11-13 02:29:11,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 411 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=401, Invalid=1761, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 02:29:11,031 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 245.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.00ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 318.63ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:11,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 289 Invalid, 620 Unknown, 0 Unchecked, 5.00ms Time], IncrementalHoareTripleChecker [7 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 318.63ms Time] [2021-11-13 02:29:11,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-11-13 02:29:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 239. [2021-11-13 02:29:11,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 222 states have (on average 1.09009009009009) internal successors, (242), 222 states have internal predecessors, (242), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 14 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 02:29:11,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 259 transitions. [2021-11-13 02:29:11,058 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 259 transitions. Word has length 210 [2021-11-13 02:29:11,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:11,059 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 259 transitions. [2021-11-13 02:29:11,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 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 02:29:11,059 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 259 transitions. [2021-11-13 02:29:11,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-13 02:29:11,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:11,064 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-13 02:29:11,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:11,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:11,291 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1997384363, now seen corresponding path program 7 times [2021-11-13 02:29:11,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:11,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675004679] [2021-11-13 02:29:11,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:11,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 1570 proven. 255 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2021-11-13 02:29:11,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:11,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675004679] [2021-11-13 02:29:11,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675004679] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:11,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698845382] [2021-11-13 02:29:11,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:29:11,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:11,783 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:11,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 02:29:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:11,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-13 02:29:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 1415 proven. 185 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2021-11-13 02:29:12,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2641 backedges. 1428 proven. 172 refuted. 0 times theorem prover too weak. 1041 trivial. 0 not checked. [2021-11-13 02:29:14,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698845382] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:14,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796116635] [2021-11-13 02:29:14,450 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:14,451 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:14,451 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 02:29:14,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:14,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 24] total 36 [2021-11-13 02:29:14,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142837013] [2021-11-13 02:29:14,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:14,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 02:29:14,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 02:29:14,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 02:29:14,456 INFO L87 Difference]: Start difference. First operand 239 states and 259 transitions. Second operand has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 31 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 02:29:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:16,002 INFO L93 Difference]: Finished difference Result 561 states and 612 transitions. [2021-11-13 02:29:16,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-13 02:29:16,003 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 31 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) Word has length 219 [2021-11-13 02:29:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:16,014 INFO L225 Difference]: With dead ends: 561 [2021-11-13 02:29:16,014 INFO L226 Difference]: Without dead ends: 394 [2021-11-13 02:29:16,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 426 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1137, Invalid=5669, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 02:29:16,023 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 477.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 567.13ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:16,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 399 Invalid, 1257 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [9 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 567.13ms Time] [2021-11-13 02:29:16,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-13 02:29:16,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 364. [2021-11-13 02:29:16,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 341 states have (on average 1.064516129032258) internal successors, (363), 341 states have internal predecessors, (363), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 20 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:29:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 386 transitions. [2021-11-13 02:29:16,066 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 386 transitions. Word has length 219 [2021-11-13 02:29:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:16,067 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 386 transitions. [2021-11-13 02:29:16,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.611111111111111) internal successors, (94), 31 states have internal predecessors, (94), 1 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (7), 7 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 02:29:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 386 transitions. [2021-11-13 02:29:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-13 02:29:16,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:16,073 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-13 02:29:16,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:16,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:16,284 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:16,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:16,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1299852982, now seen corresponding path program 8 times [2021-11-13 02:29:16,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:16,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17740104] [2021-11-13 02:29:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:16,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:16,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 1818 proven. 188 refuted. 0 times theorem prover too weak. 1349 trivial. 0 not checked. [2021-11-13 02:29:16,815 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:16,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17740104] [2021-11-13 02:29:16,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17740104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:16,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363170903] [2021-11-13 02:29:16,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:29:16,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:16,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:16,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:16,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 02:29:16,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-13 02:29:16,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:16,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 02:29:16,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 1278 proven. 192 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2021-11-13 02:29:18,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 1278 proven. 192 refuted. 0 times theorem prover too weak. 1885 trivial. 0 not checked. [2021-11-13 02:29:19,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363170903] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:19,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1672501373] [2021-11-13 02:29:19,532 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:19,532 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:19,533 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 02:29:19,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:19,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 18] total 63 [2021-11-13 02:29:19,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026274584] [2021-11-13 02:29:19,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:19,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-13 02:29:19,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-13 02:29:19,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3469, Unknown=0, NotChecked=0, Total=3906 [2021-11-13 02:29:19,540 INFO L87 Difference]: Start difference. First operand 364 states and 386 transitions. Second operand has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 60 states have internal predecessors, (125), 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 02:29:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:23,883 INFO L93 Difference]: Finished difference Result 1645 states and 1845 transitions. [2021-11-13 02:29:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-13 02:29:23,883 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 60 states have internal predecessors, (125), 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 244 [2021-11-13 02:29:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:23,894 INFO L225 Difference]: With dead ends: 1645 [2021-11-13 02:29:23,894 INFO L226 Difference]: Without dead ends: 1405 [2021-11-13 02:29:23,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 455 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7209 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3827, Invalid=23233, Unknown=0, NotChecked=0, Total=27060 [2021-11-13 02:29:23,909 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 754 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 662.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.38ms SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 812.95ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:23,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 453 Invalid, 1423 Unknown, 0 Unchecked, 8.38ms Time], IncrementalHoareTripleChecker [166 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 812.95ms Time] [2021-11-13 02:29:23,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1405 states. [2021-11-13 02:29:23,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1405 to 546. [2021-11-13 02:29:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 518 states have (on average 1.0810810810810811) internal successors, (560), 518 states have internal predecessors, (560), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 25 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 02:29:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 588 transitions. [2021-11-13 02:29:23,984 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 588 transitions. Word has length 244 [2021-11-13 02:29:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:24,005 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 588 transitions. [2021-11-13 02:29:24,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 60 states have internal predecessors, (125), 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 02:29:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 588 transitions. [2021-11-13 02:29:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-11-13 02:29:24,013 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:24,014 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 13, 12, 12, 12, 12, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2021-11-13 02:29:24,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:24,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 02:29:24,235 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash -325348062, now seen corresponding path program 9 times [2021-11-13 02:29:24,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:24,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871411861] [2021-11-13 02:29:24,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:24,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:25,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5448 backedges. 2294 proven. 2126 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-13 02:29:25,106 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:25,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871411861] [2021-11-13 02:29:25,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871411861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:25,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430472106] [2021-11-13 02:29:25,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:29:25,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:25,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:25,108 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:25,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 02:29:25,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:29:25,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:25,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 02:29:25,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5448 backedges. 2318 proven. 2102 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-13 02:29:26,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5448 backedges. 2318 proven. 2102 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2021-11-13 02:29:30,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430472106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:30,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241006367] [2021-11-13 02:29:30,493 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:30,493 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:30,494 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 02:29:30,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:30,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 47 [2021-11-13 02:29:30,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218951525] [2021-11-13 02:29:30,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:30,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-13 02:29:30,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-13 02:29:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-11-13 02:29:30,499 INFO L87 Difference]: Start difference. First operand 546 states and 588 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 02:29:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:32,412 INFO L93 Difference]: Finished difference Result 782 states and 845 transitions. [2021-11-13 02:29:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-13 02:29:32,412 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 286 [2021-11-13 02:29:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:32,415 INFO L225 Difference]: With dead ends: 782 [2021-11-13 02:29:32,416 INFO L226 Difference]: Without dead ends: 307 [2021-11-13 02:29:32,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4903 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2821, Invalid=13435, Unknown=0, NotChecked=0, Total=16256 [2021-11-13 02:29:32,421 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 331 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 203.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.78ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 245.64ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:32,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 232 Invalid, 362 Unknown, 0 Unchecked, 2.78ms Time], IncrementalHoareTripleChecker [48 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 245.64ms Time] [2021-11-13 02:29:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-13 02:29:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-13 02:29:32,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 1.0616438356164384) internal successors, (310), 292 states have internal predecessors, (310), 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 02:29:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 325 transitions. [2021-11-13 02:29:32,460 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 325 transitions. Word has length 286 [2021-11-13 02:29:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:32,461 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 325 transitions. [2021-11-13 02:29:32,462 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 02:29:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 325 transitions. [2021-11-13 02:29:32,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-13 02:29:32,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:32,466 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-13 02:29:32,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:32,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 02:29:32,695 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1454758772, now seen corresponding path program 10 times [2021-11-13 02:29:32,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:32,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692605735] [2021-11-13 02:29:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:32,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6778 backedges. 4500 proven. 750 refuted. 0 times theorem prover too weak. 1528 trivial. 0 not checked. [2021-11-13 02:29:33,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:33,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692605735] [2021-11-13 02:29:33,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692605735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:33,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101559712] [2021-11-13 02:29:33,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:29:33,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:33,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:33,606 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:33,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 02:29:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-13 02:29:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6778 backedges. 4472 proven. 776 refuted. 0 times theorem prover too weak. 1530 trivial. 0 not checked. [2021-11-13 02:29:34,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6778 backedges. 4506 proven. 742 refuted. 0 times theorem prover too weak. 1530 trivial. 0 not checked. [2021-11-13 02:29:38,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101559712] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:38,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [717992503] [2021-11-13 02:29:38,437 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:38,437 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:38,438 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 02:29:38,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:38,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 45 [2021-11-13 02:29:38,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942837971] [2021-11-13 02:29:38,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:38,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-13 02:29:38,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:38,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-13 02:29:38,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1736, Unknown=0, NotChecked=0, Total=1980 [2021-11-13 02:29:38,443 INFO L87 Difference]: Start difference. First operand 307 states and 325 transitions. Second operand has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 36 states have internal predecessors, (111), 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 02:29:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:39,954 INFO L93 Difference]: Finished difference Result 441 states and 475 transitions. [2021-11-13 02:29:39,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-13 02:29:39,955 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 36 states have internal predecessors, (111), 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 308 [2021-11-13 02:29:39,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:39,959 INFO L225 Difference]: With dead ends: 441 [2021-11-13 02:29:39,960 INFO L226 Difference]: Without dead ends: 307 [2021-11-13 02:29:39,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 614 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3873 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2159, Invalid=10723, Unknown=0, NotChecked=0, Total=12882 [2021-11-13 02:29:39,964 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 72 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 397.56ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:39,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 310 Invalid, 712 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [12 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 397.56ms Time] [2021-11-13 02:29:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-13 02:29:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2021-11-13 02:29:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 292 states have (on average 1.0513698630136987) internal successors, (307), 292 states have internal predecessors, (307), 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 02:29:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 322 transitions. [2021-11-13 02:29:40,002 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 322 transitions. Word has length 308 [2021-11-13 02:29:40,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:40,002 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 322 transitions. [2021-11-13 02:29:40,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.466666666666667) internal successors, (111), 36 states have internal predecessors, (111), 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 02:29:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 322 transitions. [2021-11-13 02:29:40,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-11-13 02:29:40,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:40,006 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-11-13 02:29:40,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:40,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 02:29:40,227 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash 991097137, now seen corresponding path program 11 times [2021-11-13 02:29:40,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:40,228 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70122359] [2021-11-13 02:29:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:40,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 2694 proven. 3267 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2021-11-13 02:29:41,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:41,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70122359] [2021-11-13 02:29:41,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70122359] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:41,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52760372] [2021-11-13 02:29:41,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:29:41,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:41,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:41,135 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:41,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 02:29:41,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-13 02:29:41,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 02:29:41,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 3330 proven. 1301 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2021-11-13 02:29:42,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:29:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7091 backedges. 3330 proven. 1301 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2021-11-13 02:29:45,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52760372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:29:45,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [631635280] [2021-11-13 02:29:45,275 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:29:45,275 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:29:45,275 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 02:29:45,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:29:45,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 25, 25] total 95 [2021-11-13 02:29:45,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313191887] [2021-11-13 02:29:45,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:29:45,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-13 02:29:45,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:29:45,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-13 02:29:45,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=7938, Unknown=0, NotChecked=0, Total=8930 [2021-11-13 02:29:45,282 INFO L87 Difference]: Start difference. First operand 307 states and 322 transitions. Second operand has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 82 states have internal predecessors, (207), 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 02:29:55,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:29:55,161 INFO L93 Difference]: Finished difference Result 788 states and 873 transitions. [2021-11-13 02:29:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 253 states. [2021-11-13 02:29:55,162 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 82 states have internal predecessors, (207), 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 321 [2021-11-13 02:29:55,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:29:55,167 INFO L225 Difference]: With dead ends: 788 [2021-11-13 02:29:55,167 INFO L226 Difference]: Without dead ends: 545 [2021-11-13 02:29:55,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 597 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37108 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=20809, Invalid=75601, Unknown=0, NotChecked=0, Total=96410 [2021-11-13 02:29:55,181 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1209 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 497.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.24ms SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 570.19ms IncrementalHoareTripleChecker+Time [2021-11-13 02:29:55,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 269 Invalid, 976 Unknown, 0 Unchecked, 6.24ms Time], IncrementalHoareTripleChecker [476 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 570.19ms Time] [2021-11-13 02:29:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-13 02:29:55,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 466. [2021-11-13 02:29:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 448 states have (on average 1.0803571428571428) internal successors, (484), 448 states have internal predecessors, (484), 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 02:29:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 502 transitions. [2021-11-13 02:29:55,237 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 502 transitions. Word has length 321 [2021-11-13 02:29:55,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:29:55,238 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 502 transitions. [2021-11-13 02:29:55,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 82 states have internal predecessors, (207), 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 02:29:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 502 transitions. [2021-11-13 02:29:55,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2021-11-13 02:29:55,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:29:55,245 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-13 02:29:55,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:29:55,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:55,470 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:29:55,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:29:55,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1111831063, now seen corresponding path program 12 times [2021-11-13 02:29:55,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:29:55,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859412715] [2021-11-13 02:29:55,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:29:55,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:29:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:29:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 18866 backedges. 12502 proven. 1477 refuted. 0 times theorem prover too weak. 4887 trivial. 0 not checked. [2021-11-13 02:29:56,580 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:29:56,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859412715] [2021-11-13 02:29:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859412715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:29:56,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125129091] [2021-11-13 02:29:56,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:29:56,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:29:56,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:29:56,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:29:56,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 02:29:56,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:29:56,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:29:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-13 02:29:56,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:29:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18866 backedges. 12457 proven. 1520 refuted. 0 times theorem prover too weak. 4889 trivial. 0 not checked. [2021-11-13 02:29:57,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 18866 backedges. 12510 proven. 1467 refuted. 0 times theorem prover too weak. 4889 trivial. 0 not checked. [2021-11-13 02:30:05,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125129091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:05,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989859480] [2021-11-13 02:30:05,107 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:30:05,107 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:30:05,107 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 02:30:05,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:30:05,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 49, 49] total 55 [2021-11-13 02:30:05,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100030228] [2021-11-13 02:30:05,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:30:05,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-13 02:30:05,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:30:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-13 02:30:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2617, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 02:30:05,113 INFO L87 Difference]: Start difference. First operand 466 states and 502 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 02:30:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:07,175 INFO L93 Difference]: Finished difference Result 762 states and 834 transitions. [2021-11-13 02:30:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-13 02:30:07,176 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 473 [2021-11-13 02:30:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:07,180 INFO L225 Difference]: With dead ends: 762 [2021-11-13 02:30:07,180 INFO L226 Difference]: Without dead ends: 469 [2021-11-13 02:30:07,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 944 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8137 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4277, Invalid=21163, Unknown=0, NotChecked=0, Total=25440 [2021-11-13 02:30:07,187 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 379.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.61ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 453.92ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:07,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 418 Invalid, 1143 Unknown, 0 Unchecked, 3.61ms Time], IncrementalHoareTripleChecker [14 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 453.92ms Time] [2021-11-13 02:30:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-13 02:30:07,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 469. [2021-11-13 02:30:07,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 451 states have (on average 1.0620842572062084) internal successors, (479), 451 states have internal predecessors, (479), 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 02:30:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 497 transitions. [2021-11-13 02:30:07,237 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 497 transitions. Word has length 473 [2021-11-13 02:30:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:07,238 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 497 transitions. [2021-11-13 02:30:07,239 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 02:30:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 497 transitions. [2021-11-13 02:30:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-11-13 02:30:07,243 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:07,244 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 17, 16, 16, 16, 16, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2021-11-13 02:30:07,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:07,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:30:07,471 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:30:07,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash -742799454, now seen corresponding path program 13 times [2021-11-13 02:30:07,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:30:07,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049525456] [2021-11-13 02:30:07,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:07,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:30:07,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 19344 backedges. 8859 proven. 6875 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-13 02:30:08,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:30:08,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049525456] [2021-11-13 02:30:08,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049525456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:30:08,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733959929] [2021-11-13 02:30:08,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:30:08,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:30:08,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:30:08,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:30:08,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 02:30:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:09,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-13 02:30:09,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 19344 backedges. 8892 proven. 6842 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-13 02:30:10,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 19344 backedges. 8892 proven. 6842 refuted. 0 times theorem prover too weak. 3610 trivial. 0 not checked. [2021-11-13 02:30:19,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733959929] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:19,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1333617510] [2021-11-13 02:30:19,667 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:30:19,667 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:30:19,667 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 02:30:19,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:30:19,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 59] total 62 [2021-11-13 02:30:19,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163105446] [2021-11-13 02:30:19,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:30:19,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 02:30:19,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:30:19,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 02:30:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3351, Unknown=0, NotChecked=0, Total=3782 [2021-11-13 02:30:19,673 INFO L87 Difference]: Start difference. First operand 469 states and 497 transitions. Second operand has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 50 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 02:30:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:23,354 INFO L93 Difference]: Finished difference Result 738 states and 795 transitions. [2021-11-13 02:30:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-13 02:30:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 50 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) Word has length 486 [2021-11-13 02:30:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:23,359 INFO L225 Difference]: With dead ends: 738 [2021-11-13 02:30:23,360 INFO L226 Difference]: Without dead ends: 508 [2021-11-13 02:30:23,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 981 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14962 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7611, Invalid=34619, Unknown=0, NotChecked=0, Total=42230 [2021-11-13 02:30:23,368 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 447 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 259.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.94ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 296.35ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:23,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 193 Invalid, 467 Unknown, 0 Unchecked, 2.94ms Time], IncrementalHoareTripleChecker [63 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 296.35ms Time] [2021-11-13 02:30:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-13 02:30:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 508. [2021-11-13 02:30:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 489 states have (on average 1.0572597137014315) internal successors, (517), 489 states have internal predecessors, (517), 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 02:30:23,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 536 transitions. [2021-11-13 02:30:23,425 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 536 transitions. Word has length 486 [2021-11-13 02:30:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:23,426 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 536 transitions. [2021-11-13 02:30:23,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.306451612903226) internal successors, (143), 50 states have internal predecessors, (143), 1 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (14), 14 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 02:30:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 536 transitions. [2021-11-13 02:30:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-11-13 02:30:23,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:23,432 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2021-11-13 02:30:23,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:23,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 02:30:23,659 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:30:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2049396699, now seen corresponding path program 14 times [2021-11-13 02:30:23,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:30:23,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492145681] [2021-11-13 02:30:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:23,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:30:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22921 backedges. 15846 proven. 1971 refuted. 0 times theorem prover too weak. 5104 trivial. 0 not checked. [2021-11-13 02:30:24,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:30:24,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492145681] [2021-11-13 02:30:24,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492145681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:30:24,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819444007] [2021-11-13 02:30:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:30:24,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:30:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:30:24,849 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:30:24,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 02:30:25,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-11-13 02:30:25,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:30:25,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 815 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-13 02:30:25,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22921 backedges. 11185 proven. 4483 refuted. 0 times theorem prover too weak. 7253 trivial. 0 not checked. [2021-11-13 02:30:27,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:30:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 22921 backedges. 11185 proven. 4483 refuted. 0 times theorem prover too weak. 7253 trivial. 0 not checked. [2021-11-13 02:30:30,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819444007] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:30:30,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [671873055] [2021-11-13 02:30:30,625 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:30:30,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:30:30,626 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 02:30:30,627 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:30:30,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 32, 32] total 120 [2021-11-13 02:30:30,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724617025] [2021-11-13 02:30:30,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:30:30,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-13 02:30:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:30:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-13 02:30:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=13051, Unknown=0, NotChecked=0, Total=14280 [2021-11-13 02:30:30,630 INFO L87 Difference]: Start difference. First operand 508 states and 536 transitions. Second operand has 120 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 102 states have internal predecessors, (257), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-13 02:30:48,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:30:48,289 INFO L93 Difference]: Finished difference Result 1444 states and 1609 transitions. [2021-11-13 02:30:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2021-11-13 02:30:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 102 states have internal predecessors, (257), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) Word has length 517 [2021-11-13 02:30:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:30:48,299 INFO L225 Difference]: With dead ends: 1444 [2021-11-13 02:30:48,299 INFO L226 Difference]: Without dead ends: 1018 [2021-11-13 02:30:48,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 972 SyntacticMatches, 0 SemanticMatches, 526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110371 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=42663, Invalid=235593, Unknown=0, NotChecked=0, Total=278256 [2021-11-13 02:30:48,327 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 1670 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1012.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.94ms SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1177.26ms IncrementalHoareTripleChecker+Time [2021-11-13 02:30:48,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 781 Invalid, 2881 Unknown, 0 Unchecked, 10.94ms Time], IncrementalHoareTripleChecker [506 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 1177.26ms Time] [2021-11-13 02:30:48,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-11-13 02:30:48,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 703. [2021-11-13 02:30:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 681 states have (on average 1.0719530102790014) internal successors, (730), 681 states have internal predecessors, (730), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 02:30:48,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 752 transitions. [2021-11-13 02:30:48,417 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 752 transitions. Word has length 517 [2021-11-13 02:30:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:30:48,418 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 752 transitions. [2021-11-13 02:30:48,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 102 states have internal predecessors, (257), 1 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (20), 20 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-13 02:30:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 752 transitions. [2021-11-13 02:30:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2021-11-13 02:30:48,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:30:48,428 INFO L514 BasicCegarLoop]: trace histogram [172, 172, 172, 21, 20, 20, 20, 20, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-13 02:30:48,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:30:48,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 02:30:48,647 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:30:48,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:30:48,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1109689662, now seen corresponding path program 15 times [2021-11-13 02:30:48,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:30:48,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83272999] [2021-11-13 02:30:48,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:30:48,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:30:48,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:30:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49105 backedges. 29029 proven. 593 refuted. 0 times theorem prover too weak. 19483 trivial. 0 not checked. [2021-11-13 02:30:49,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:30:49,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83272999] [2021-11-13 02:30:49,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83272999] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:30:49,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059996997] [2021-11-13 02:30:49,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:30:49,959 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:30:49,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:30:49,960 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:30:49,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 02:30:50,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:30:50,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:30:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 1648 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-13 02:30:50,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:30:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49105 backedges. 30824 proven. 2628 refuted. 0 times theorem prover too weak. 15653 trivial. 0 not checked. [2021-11-13 02:30:52,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49105 backedges. 30900 proven. 2552 refuted. 0 times theorem prover too weak. 15653 trivial. 0 not checked. [2021-11-13 02:31:06,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059996997] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:06,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918471016] [2021-11-13 02:31:06,495 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:31:06,495 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:06,496 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 02:31:06,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:06,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 59, 59] total 80 [2021-11-13 02:31:06,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684548759] [2021-11-13 02:31:06,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:06,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-13 02:31:06,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-13 02:31:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2021-11-13 02:31:06,501 INFO L87 Difference]: Start difference. First operand 703 states and 752 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 02:31:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:13,854 INFO L93 Difference]: Finished difference Result 1092 states and 1190 transitions. [2021-11-13 02:31:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2021-11-13 02:31:13,854 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 728 [2021-11-13 02:31:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:13,859 INFO L225 Difference]: With dead ends: 1092 [2021-11-13 02:31:13,859 INFO L226 Difference]: Without dead ends: 709 [2021-11-13 02:31:13,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1679 GetRequests, 1423 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 02:31:13,869 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 116 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 7617 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1890.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 7630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.15ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 7617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2297.04ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:13,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1004 Invalid, 7630 Unknown, 0 Unchecked, 14.15ms Time], IncrementalHoareTripleChecker [13 Valid, 7617 Invalid, 0 Unknown, 0 Unchecked, 2297.04ms Time] [2021-11-13 02:31:13,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2021-11-13 02:31:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 709. [2021-11-13 02:31:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 687 states have (on average 1.0655021834061136) internal successors, (732), 687 states have internal predecessors, (732), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 02:31:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 754 transitions. [2021-11-13 02:31:13,941 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 754 transitions. Word has length 728 [2021-11-13 02:31:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 754 transitions. [2021-11-13 02:31:13,943 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 02:31:13,943 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 754 transitions. [2021-11-13 02:31:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2021-11-13 02:31:13,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:13,953 INFO L514 BasicCegarLoop]: trace histogram [174, 174, 174, 21, 20, 20, 20, 20, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-13 02:31:13,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-11-13 02:31:14,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 02:31:14,175 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:31:14,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:14,175 INFO L85 PathProgramCache]: Analyzing trace with hash 704257006, now seen corresponding path program 16 times [2021-11-13 02:31:14,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:14,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081540034] [2021-11-13 02:31:14,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:14,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:15,810 INFO L134 CoverageAnalysis]: Checked inductivity of 50176 backedges. 34151 proven. 3265 refuted. 0 times theorem prover too weak. 12760 trivial. 0 not checked. [2021-11-13 02:31:15,810 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:15,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081540034] [2021-11-13 02:31:15,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081540034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:15,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090073901] [2021-11-13 02:31:15,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:31:15,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:15,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:15,812 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:15,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 02:31:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-13 02:31:16,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 50176 backedges. 34073 proven. 3341 refuted. 0 times theorem prover too weak. 12762 trivial. 0 not checked. [2021-11-13 02:31:17,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50176 backedges. 34162 proven. 3252 refuted. 0 times theorem prover too weak. 12762 trivial. 0 not checked. [2021-11-13 02:31:33,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090073901] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:33,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [876122288] [2021-11-13 02:31:33,671 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:31:33,671 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:33,671 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 02:31:33,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:33,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 64, 64] total 70 [2021-11-13 02:31:33,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73177594] [2021-11-13 02:31:33,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:33,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-13 02:31:33,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:33,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-13 02:31:33,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=4276, Unknown=0, NotChecked=0, Total=4830 [2021-11-13 02:31:33,675 INFO L87 Difference]: Start difference. First operand 709 states and 754 transitions. Second operand has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 56 states have internal predecessors, (166), 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 02:31:37,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:31:37,329 INFO L93 Difference]: Finished difference Result 1056 states and 1144 transitions. [2021-11-13 02:31:37,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2021-11-13 02:31:37,329 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 56 states have internal predecessors, (166), 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 734 [2021-11-13 02:31:37,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:31:37,333 INFO L225 Difference]: With dead ends: 1056 [2021-11-13 02:31:37,333 INFO L226 Difference]: Without dead ends: 712 [2021-11-13 02:31:37,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1710 GetRequests, 1466 SyntacticMatches, 2 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20323 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10219, Invalid=49073, Unknown=0, NotChecked=0, Total=59292 [2021-11-13 02:31:37,343 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 507.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.81ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 599.91ms IncrementalHoareTripleChecker+Time [2021-11-13 02:31:37,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 602 Invalid, 1681 Unknown, 0 Unchecked, 4.81ms Time], IncrementalHoareTripleChecker [17 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 599.91ms Time] [2021-11-13 02:31:37,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2021-11-13 02:31:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2021-11-13 02:31:37,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 690 states have (on average 1.0594202898550724) internal successors, (731), 690 states have internal predecessors, (731), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 19 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 02:31:37,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 753 transitions. [2021-11-13 02:31:37,421 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 753 transitions. Word has length 734 [2021-11-13 02:31:37,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:31:37,421 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 753 transitions. [2021-11-13 02:31:37,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 56 states have internal predecessors, (166), 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 02:31:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 753 transitions. [2021-11-13 02:31:37,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 728 [2021-11-13 02:31:37,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:31:37,430 INFO L514 BasicCegarLoop]: trace histogram [175, 175, 175, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2021-11-13 02:31:37,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:31:37,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:37,643 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:31:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:31:37,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1641030089, now seen corresponding path program 17 times [2021-11-13 02:31:37,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:31:37,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092326540] [2021-11-13 02:31:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:31:37,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:31:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:31:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 50527 backedges. 23980 proven. 17087 refuted. 0 times theorem prover too weak. 9460 trivial. 0 not checked. [2021-11-13 02:31:39,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:31:39,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092326540] [2021-11-13 02:31:39,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092326540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:31:39,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959203606] [2021-11-13 02:31:39,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:31:39,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:31:39,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:31:39,481 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:31:39,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 02:31:40,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-11-13 02:31:40,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:31:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-13 02:31:40,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:31:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 50527 backedges. 24699 proven. 11893 refuted. 0 times theorem prover too weak. 13935 trivial. 0 not checked. [2021-11-13 02:31:42,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:31:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 50527 backedges. 24699 proven. 11893 refuted. 0 times theorem prover too weak. 13935 trivial. 0 not checked. [2021-11-13 02:31:49,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959203606] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:31:49,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [459529219] [2021-11-13 02:31:49,236 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:31:49,236 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:31:49,237 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 02:31:49,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:31:49,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 41, 41] total 152 [2021-11-13 02:31:49,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028416646] [2021-11-13 02:31:49,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:31:49,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-13 02:31:49,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:31:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-13 02:31:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2428, Invalid=20524, Unknown=0, NotChecked=0, Total=22952 [2021-11-13 02:31:49,242 INFO L87 Difference]: Start difference. First operand 712 states and 753 transitions. Second operand has 152 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 130 states have internal predecessors, (324), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-13 02:32:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:25,141 INFO L93 Difference]: Finished difference Result 2622 states and 2932 transitions. [2021-11-13 02:32:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 634 states. [2021-11-13 02:32:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 130 states have internal predecessors, (324), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) Word has length 727 [2021-11-13 02:32:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:25,151 INFO L225 Difference]: With dead ends: 2622 [2021-11-13 02:32:25,151 INFO L226 Difference]: Without dead ends: 1893 [2021-11-13 02:32:25,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2101 GetRequests, 1377 SyntacticMatches, 0 SemanticMatches, 724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245093 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=120699, Invalid=405651, Unknown=0, NotChecked=0, Total=526350 [2021-11-13 02:32:25,193 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 3859 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 1585 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 840.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3859 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.07ms SdHoareTripleChecker+Time, 1585 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 977.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3859 Valid, 307 Invalid, 2447 Unknown, 0 Unchecked, 11.07ms Time], IncrementalHoareTripleChecker [1585 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 977.88ms Time] [2021-11-13 02:32:25,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-11-13 02:32:25,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1081. [2021-11-13 02:32:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1054 states have (on average 1.0806451612903225) internal successors, (1139), 1054 states have internal predecessors, (1139), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 02:32:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1166 transitions. [2021-11-13 02:32:25,332 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1166 transitions. Word has length 727 [2021-11-13 02:32:25,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:25,333 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 1166 transitions. [2021-11-13 02:32:25,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 130 states have internal predecessors, (324), 1 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (24), 24 states have call predecessors, (24), 1 states have call successors, (24) [2021-11-13 02:32:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1166 transitions. [2021-11-13 02:32:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1114 [2021-11-13 02:32:25,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:25,349 INFO L514 BasicCegarLoop]: trace histogram [282, 282, 282, 26, 25, 25, 25, 25, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-13 02:32:25,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:32:25,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 02:32:25,572 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:25,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:25,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1904585625, now seen corresponding path program 18 times [2021-11-13 02:32:25,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:25,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962888340] [2021-11-13 02:32:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:25,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 128395 backedges. 74291 proven. 944 refuted. 0 times theorem prover too weak. 53160 trivial. 0 not checked. [2021-11-13 02:32:27,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:27,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962888340] [2021-11-13 02:32:27,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962888340] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:27,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312365236] [2021-11-13 02:32:27,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:32:27,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:27,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:27,342 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:27,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 02:32:28,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:32:28,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:32:28,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 2533 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-13 02:32:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 128395 backedges. 21548 proven. 1080 refuted. 0 times theorem prover too weak. 105767 trivial. 0 not checked. [2021-11-13 02:32:32,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:32:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 128395 backedges. 21548 proven. 1080 refuted. 0 times theorem prover too weak. 105767 trivial. 0 not checked. [2021-11-13 02:32:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312365236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:32:37,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1205869486] [2021-11-13 02:32:37,783 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:32:37,783 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:32:37,784 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 02:32:37,785 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:32:37,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 57, 57] total 173 [2021-11-13 02:32:37,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419622011] [2021-11-13 02:32:37,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:32:37,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2021-11-13 02:32:37,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:32:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2021-11-13 02:32:37,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4015, Invalid=25741, Unknown=0, NotChecked=0, Total=29756 [2021-11-13 02:32:37,794 INFO L87 Difference]: Start difference. First operand 1081 states and 1166 transitions. Second operand has 173 states, 173 states have (on average 1.6358381502890174) internal successors, (283), 172 states have internal predecessors, (283), 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 02:32:47,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:32:47,889 INFO L93 Difference]: Finished difference Result 2850 states and 3313 transitions. [2021-11-13 02:32:47,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-11-13 02:32:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.6358381502890174) internal successors, (283), 172 states have internal predecessors, (283), 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 1113 [2021-11-13 02:32:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:32:47,902 INFO L225 Difference]: With dead ends: 2850 [2021-11-13 02:32:47,902 INFO L226 Difference]: Without dead ends: 2135 [2021-11-13 02:32:47,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2470 GetRequests, 2115 SyntacticMatches, 0 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34663 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=21834, Invalid=105258, Unknown=0, NotChecked=0, Total=127092 [2021-11-13 02:32:47,920 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 2186 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 3150 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 999.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2186 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 3510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.09ms SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 3150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1199.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:32:47,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2186 Valid, 843 Invalid, 3510 Unknown, 0 Unchecked, 11.09ms Time], IncrementalHoareTripleChecker [360 Valid, 3150 Invalid, 0 Unknown, 0 Unchecked, 1199.67ms Time] [2021-11-13 02:32:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2135 states. [2021-11-13 02:32:48,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2135 to 1258. [2021-11-13 02:32:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1231 states have (on average 1.0812347684809098) internal successors, (1331), 1231 states have internal predecessors, (1331), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 02:32:48,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1358 transitions. [2021-11-13 02:32:48,094 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1358 transitions. Word has length 1113 [2021-11-13 02:32:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:32:48,095 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1358 transitions. [2021-11-13 02:32:48,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.6358381502890174) internal successors, (283), 172 states have internal predecessors, (283), 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 02:32:48,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1358 transitions. [2021-11-13 02:32:48,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1207 [2021-11-13 02:32:48,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:32:48,115 INFO L514 BasicCegarLoop]: trace histogram [313, 313, 313, 26, 25, 25, 25, 25, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-13 02:32:48,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-13 02:32:48,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:48,331 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:32:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:32:48,332 INFO L85 PathProgramCache]: Analyzing trace with hash -986258540, now seen corresponding path program 19 times [2021-11-13 02:32:48,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:32:48,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281425063] [2021-11-13 02:32:48,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:32:48,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:32:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 156729 backedges. 89503 proven. 1079 refuted. 0 times theorem prover too weak. 66147 trivial. 0 not checked. [2021-11-13 02:32:50,558 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:32:50,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281425063] [2021-11-13 02:32:50,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281425063] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:32:50,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925416014] [2021-11-13 02:32:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:32:50,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:32:50,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:32:50,559 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:32:50,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 02:32:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:32:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 2750 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 02:32:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:32:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 156729 backedges. 98730 proven. 6224 refuted. 0 times theorem prover too weak. 51775 trivial. 0 not checked. [2021-11-13 02:32:54,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:33:30,871 INFO L134 CoverageAnalysis]: Checked inductivity of 156729 backedges. 98864 proven. 6090 refuted. 0 times theorem prover too weak. 51775 trivial. 0 not checked. [2021-11-13 02:33:30,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925416014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:33:30,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1765890060] [2021-11-13 02:33:30,873 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:33:30,873 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:33:30,873 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 02:33:30,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:33:30,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 79, 79] total 108 [2021-11-13 02:33:30,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405751569] [2021-11-13 02:33:30,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:33:30,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-13 02:33:30,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:33:30,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-13 02:33:30,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=979, Invalid=10577, Unknown=0, NotChecked=0, Total=11556 [2021-11-13 02:33:30,881 INFO L87 Difference]: Start difference. First operand 1258 states and 1358 transitions. Second operand has 108 states, 108 states have (on average 2.185185185185185) internal successors, (236), 93 states have internal predecessors, (236), 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 02:33:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:33:45,887 INFO L93 Difference]: Finished difference Result 2154 states and 2355 transitions. [2021-11-13 02:33:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 317 states. [2021-11-13 02:33:45,887 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.185185185185185) internal successors, (236), 93 states have internal predecessors, (236), 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 1206 [2021-11-13 02:33:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:33:45,894 INFO L225 Difference]: With dead ends: 2154 [2021-11-13 02:33:45,894 INFO L226 Difference]: Without dead ends: 1264 [2021-11-13 02:33:45,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2775 GetRequests, 2367 SyntacticMatches, 3 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50942 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=22844, Invalid=142398, Unknown=0, NotChecked=0, Total=165242 [2021-11-13 02:33:45,914 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 168 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 10514 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2666.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 10531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.37ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 10514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3234.14ms IncrementalHoareTripleChecker+Time [2021-11-13 02:33:45,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1018 Invalid, 10531 Unknown, 0 Unchecked, 21.37ms Time], IncrementalHoareTripleChecker [17 Valid, 10514 Invalid, 0 Unknown, 0 Unchecked, 3234.14ms Time] [2021-11-13 02:33:45,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2021-11-13 02:33:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1264. [2021-11-13 02:33:46,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1237 states have (on average 1.0759902991107517) internal successors, (1331), 1237 states have internal predecessors, (1331), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 24 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 02:33:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1358 transitions. [2021-11-13 02:33:46,075 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1358 transitions. Word has length 1206 [2021-11-13 02:33:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:33:46,076 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1358 transitions. [2021-11-13 02:33:46,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.185185185185185) internal successors, (236), 93 states have internal predecessors, (236), 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 02:33:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1358 transitions. [2021-11-13 02:33:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1203 [2021-11-13 02:33:46,098 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:33:46,099 INFO L514 BasicCegarLoop]: trace histogram [315, 315, 315, 24, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-11-13 02:33:46,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:33:46,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-13 02:33:46,323 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:33:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:33:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -842205688, now seen corresponding path program 20 times [2021-11-13 02:33:46,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:33:46,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516425203] [2021-11-13 02:33:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:33:46,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:33:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:33:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 158417 backedges. 107112 proven. 7329 refuted. 0 times theorem prover too weak. 43976 trivial. 0 not checked. [2021-11-13 02:33:49,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:33:49,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516425203] [2021-11-13 02:33:49,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516425203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:33:49,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536753377] [2021-11-13 02:33:49,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:33:49,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:33:49,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:33:49,357 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:33:49,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 02:33:50,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2021-11-13 02:33:50,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:33:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1743 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-13 02:33:50,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:33:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 158417 backedges. 77450 proven. 40107 refuted. 0 times theorem prover too weak. 40860 trivial. 0 not checked. [2021-11-13 02:33:54,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:34:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 158417 backedges. 77450 proven. 40107 refuted. 0 times theorem prover too weak. 40860 trivial. 0 not checked. [2021-11-13 02:34:05,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536753377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:34:05,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468581526] [2021-11-13 02:34:05,613 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:34:05,613 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:34:05,614 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 02:34:05,615 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:34:05,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 50, 50] total 186 [2021-11-13 02:34:05,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330596283] [2021-11-13 02:34:05,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:34:05,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2021-11-13 02:34:05,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:34:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2021-11-13 02:34:05,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2800, Invalid=31610, Unknown=0, NotChecked=0, Total=34410 [2021-11-13 02:34:05,624 INFO L87 Difference]: Start difference. First operand 1264 states and 1358 transitions. Second operand has 186 states, 186 states have (on average 2.1021505376344085) internal successors, (391), 158 states have internal predecessors, (391), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) [2021-11-13 02:35:13,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:35:13,949 INFO L93 Difference]: Finished difference Result 5439 states and 6101 transitions. [2021-11-13 02:35:13,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 983 states. [2021-11-13 02:35:13,950 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 2.1021505376344085) internal successors, (391), 158 states have internal predecessors, (391), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) Word has length 1202 [2021-11-13 02:35:13,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:35:13,964 INFO L225 Difference]: With dead ends: 5439 [2021-11-13 02:35:13,964 INFO L226 Difference]: Without dead ends: 3910 [2021-11-13 02:35:14,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3469 GetRequests, 2306 SyntacticMatches, 0 SemanticMatches, 1163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599377 ImplicationChecksByTransitivity, 69.6s TimeCoverageRelationStatistics Valid=203979, Invalid=1152081, Unknown=0, NotChecked=0, Total=1356060 [2021-11-13 02:35:14,075 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 4613 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 4800 mSolverCounterSat, 1431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2015.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4613 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 6231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.30ms SdHoareTripleChecker+Time, 1431 IncrementalHoareTripleChecker+Valid, 4800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2351.31ms IncrementalHoareTripleChecker+Time [2021-11-13 02:35:14,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4613 Valid, 1267 Invalid, 6231 Unknown, 0 Unchecked, 24.30ms Time], IncrementalHoareTripleChecker [1431 Valid, 4800 Invalid, 0 Unknown, 0 Unchecked, 2351.31ms Time] [2021-11-13 02:35:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3910 states. [2021-11-13 02:35:14,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3910 to 1732. [2021-11-13 02:35:14,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1732 states, 1699 states have (on average 1.0806356680400235) internal successors, (1836), 1699 states have internal predecessors, (1836), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 30 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-13 02:35:14,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 1869 transitions. [2021-11-13 02:35:14,389 INFO L78 Accepts]: Start accepts. Automaton has 1732 states and 1869 transitions. Word has length 1202 [2021-11-13 02:35:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:35:14,390 INFO L470 AbstractCegarLoop]: Abstraction has 1732 states and 1869 transitions. [2021-11-13 02:35:14,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 2.1021505376344085) internal successors, (391), 158 states have internal predecessors, (391), 1 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (30), 30 states have call predecessors, (30), 1 states have call successors, (30) [2021-11-13 02:35:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1732 states and 1869 transitions. [2021-11-13 02:35:14,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1521 [2021-11-13 02:35:14,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:35:14,417 INFO L514 BasicCegarLoop]: trace histogram [410, 410, 410, 27, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2021-11-13 02:35:14,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:35:14,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 02:35:14,627 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:35:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:35:14,628 INFO L85 PathProgramCache]: Analyzing trace with hash 50650946, now seen corresponding path program 21 times [2021-11-13 02:35:14,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:35:14,628 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280362042] [2021-11-13 02:35:14,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:35:14,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:35:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:35:17,637 INFO L134 CoverageAnalysis]: Checked inductivity of 265797 backedges. 111525 proven. 22230 refuted. 0 times theorem prover too weak. 132042 trivial. 0 not checked. [2021-11-13 02:35:17,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:35:17,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280362042] [2021-11-13 02:35:17,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280362042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:35:17,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782097040] [2021-11-13 02:35:17,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:35:17,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:35:17,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:35:17,638 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:35:17,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 02:35:19,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:35:19,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:35:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 3480 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 02:35:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:35:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 265797 backedges. 111570 proven. 22185 refuted. 0 times theorem prover too weak. 132042 trivial. 0 not checked. [2021-11-13 02:35:21,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 265797 backedges. 111570 proven. 22185 refuted. 0 times theorem prover too weak. 132042 trivial. 0 not checked. [2021-11-13 02:36:09,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782097040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:36:09,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175353400] [2021-11-13 02:36:09,591 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:36:09,591 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:36:09,592 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 02:36:09,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:36:09,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79, 79] total 82 [2021-11-13 02:36:09,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610579325] [2021-11-13 02:36:09,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:36:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-13 02:36:09,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:36:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-13 02:36:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=5909, Unknown=0, NotChecked=0, Total=6642 [2021-11-13 02:36:09,599 INFO L87 Difference]: Start difference. First operand 1732 states and 1869 transitions. Second operand has 82 states, 82 states have (on average 2.2804878048780486) internal successors, (187), 66 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-13 02:36:17,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:17,763 INFO L93 Difference]: Finished difference Result 2937 states and 3206 transitions. [2021-11-13 02:36:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 292 states. [2021-11-13 02:36:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.2804878048780486) internal successors, (187), 66 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) Word has length 1520 [2021-11-13 02:36:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:17,772 INFO L225 Difference]: With dead ends: 2937 [2021-11-13 02:36:17,773 INFO L226 Difference]: Without dead ends: 1672 [2021-11-13 02:36:17,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3389 GetRequests, 3053 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46686 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=21511, Invalid=92395, Unknown=0, NotChecked=0, Total=113906 [2021-11-13 02:36:17,792 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 674 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 377.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.98ms SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 428.33ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:17,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 245 Invalid, 720 Unknown, 0 Unchecked, 3.98ms Time], IncrementalHoareTripleChecker [85 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 428.33ms Time] [2021-11-13 02:36:17,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-13 02:36:18,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2021-11-13 02:36:18,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1640 states have (on average 1.0810975609756097) internal successors, (1773), 1640 states have internal predecessors, (1773), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 29 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 02:36:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 1805 transitions. [2021-11-13 02:36:18,103 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 1805 transitions. Word has length 1520 [2021-11-13 02:36:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:18,104 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 1805 transitions. [2021-11-13 02:36:18,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.2804878048780486) internal successors, (187), 66 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (18), 18 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-13 02:36:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 1805 transitions. [2021-11-13 02:36:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1577 [2021-11-13 02:36:18,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:18,138 INFO L514 BasicCegarLoop]: trace histogram [425, 425, 425, 28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2021-11-13 02:36:18,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:18,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 02:36:18,367 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:36:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:18,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1503242060, now seen corresponding path program 22 times [2021-11-13 02:36:18,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:36:18,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877158764] [2021-11-13 02:36:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:18,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:36:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:21,599 INFO L134 CoverageAnalysis]: Checked inductivity of 285664 backedges. 125577 proven. 28460 refuted. 0 times theorem prover too weak. 131627 trivial. 0 not checked. [2021-11-13 02:36:21,599 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:36:21,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877158764] [2021-11-13 02:36:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877158764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:36:21,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572960638] [2021-11-13 02:36:21,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 02:36:21,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:36:21,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:36:21,602 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:36:21,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-13 02:36:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 3608 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-13 02:36:24,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 285664 backedges. 125625 proven. 28412 refuted. 0 times theorem prover too weak. 131627 trivial. 0 not checked. [2021-11-13 02:36:26,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 285664 backedges. 125625 proven. 28412 refuted. 0 times theorem prover too weak. 131627 trivial. 0 not checked. [2021-11-13 02:37:21,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572960638] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:21,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1202821303] [2021-11-13 02:37:21,508 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:37:21,508 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:37:21,508 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 02:37:21,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:37:21,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 87 [2021-11-13 02:37:21,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205013588] [2021-11-13 02:37:21,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:21,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-13 02:37:21,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-13 02:37:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=821, Invalid=6661, Unknown=0, NotChecked=0, Total=7482 [2021-11-13 02:37:21,513 INFO L87 Difference]: Start difference. First operand 1672 states and 1805 transitions. Second operand has 87 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 70 states have internal predecessors, (198), 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 02:37:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:30,833 INFO L93 Difference]: Finished difference Result 2769 states and 3033 transitions. [2021-11-13 02:37:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2021-11-13 02:37:30,834 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 70 states have internal predecessors, (198), 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 1576 [2021-11-13 02:37:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:30,840 INFO L225 Difference]: With dead ends: 2769 [2021-11-13 02:37:30,840 INFO L226 Difference]: Without dead ends: 1672 [2021-11-13 02:37:30,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3540 GetRequests, 3166 SyntacticMatches, 0 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59447 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=26901, Invalid=114099, Unknown=0, NotChecked=0, Total=141000 [2021-11-13 02:37:30,857 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 836 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 394.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.21ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 454.71ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:30,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [836 Valid, 240 Invalid, 810 Unknown, 0 Unchecked, 4.21ms Time], IncrementalHoareTripleChecker [107 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 454.71ms Time] [2021-11-13 02:37:30,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2021-11-13 02:37:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1672. [2021-11-13 02:37:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1672 states, 1640 states have (on average 1.0804878048780489) internal successors, (1772), 1640 states have internal predecessors, (1772), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 29 states have call predecessors, (29), 2 states have call successors, (29) [2021-11-13 02:37:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1672 states to 1672 states and 1804 transitions. [2021-11-13 02:37:31,075 INFO L78 Accepts]: Start accepts. Automaton has 1672 states and 1804 transitions. Word has length 1576 [2021-11-13 02:37:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:31,076 INFO L470 AbstractCegarLoop]: Abstraction has 1672 states and 1804 transitions. [2021-11-13 02:37:31,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 70 states have internal predecessors, (198), 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 02:37:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1672 states and 1804 transitions. [2021-11-13 02:37:31,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1646 [2021-11-13 02:37:31,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:31,110 INFO L514 BasicCegarLoop]: trace histogram [441, 441, 441, 31, 30, 30, 30, 30, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1] [2021-11-13 02:37:31,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:31,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:31,335 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:37:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:31,335 INFO L85 PathProgramCache]: Analyzing trace with hash -835888489, now seen corresponding path program 23 times [2021-11-13 02:37:31,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:37:31,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500524034] [2021-11-13 02:37:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:31,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:37:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 307884 backedges. 173474 proven. 1376 refuted. 0 times theorem prover too weak. 133034 trivial. 0 not checked. [2021-11-13 02:37:34,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:37:34,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500524034] [2021-11-13 02:37:34,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500524034] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:34,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365592723] [2021-11-13 02:37:34,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 02:37:34,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:37:34,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:37:34,256 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:37:34,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-13 02:37:37,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-11-13 02:37:37,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:37:37,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-13 02:37:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 307884 backedges. 152265 proven. 73064 refuted. 0 times theorem prover too weak. 82555 trivial. 0 not checked. [2021-11-13 02:37:42,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 307884 backedges. 152265 proven. 73064 refuted. 0 times theorem prover too weak. 82555 trivial. 0 not checked. [2021-11-13 02:37:57,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365592723] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:37:57,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017333701] [2021-11-13 02:37:57,747 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 02:37:57,747 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 02:37:57,748 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 02:37:57,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 02:37:57,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 55, 55] total 181 [2021-11-13 02:37:57,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581625374] [2021-11-13 02:37:57,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 02:37:57,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2021-11-13 02:37:57,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 02:37:57,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2021-11-13 02:37:57,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2922, Invalid=29658, Unknown=0, NotChecked=0, Total=32580 [2021-11-13 02:37:57,755 INFO L87 Difference]: Start difference. First operand 1672 states and 1804 transitions. Second operand has 181 states, 181 states have (on average 1.861878453038674) internal successors, (337), 168 states have internal predecessors, (337), 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 02:38:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:53,538 INFO L93 Difference]: Finished difference Result 6486 states and 7263 transitions. [2021-11-13 02:38:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 826 states. [2021-11-13 02:38:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 1.861878453038674) internal successors, (337), 168 states have internal predecessors, (337), 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 1645 [2021-11-13 02:38:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:53,559 INFO L225 Difference]: With dead ends: 6486 [2021-11-13 02:38:53,559 INFO L226 Difference]: Without dead ends: 4441 [2021-11-13 02:38:53,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4183 GetRequests, 3183 SyntacticMatches, 0 SemanticMatches, 1000 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389390 ImplicationChecksByTransitivity, 57.1s TimeCoverageRelationStatistics Valid=88884, Invalid=914118, Unknown=0, NotChecked=0, Total=1003002 [2021-11-13 02:38:53,621 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 8318 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 4828 mSolverCounterSat, 2345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2578.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8318 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 7173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.81ms SdHoareTripleChecker+Time, 2345 IncrementalHoareTripleChecker+Valid, 4828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3001.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:53,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8318 Valid, 1392 Invalid, 7173 Unknown, 0 Unchecked, 30.81ms Time], IncrementalHoareTripleChecker [2345 Valid, 4828 Invalid, 0 Unknown, 0 Unchecked, 3001.87ms Time] [2021-11-13 02:38:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2021-11-13 02:38:54,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 1945. [2021-11-13 02:38:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1945 states, 1910 states have (on average 1.081675392670157) internal successors, (2066), 1910 states have internal predecessors, (2066), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 32 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-13 02:38:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1945 states to 1945 states and 2101 transitions. [2021-11-13 02:38:54,156 INFO L78 Accepts]: Start accepts. Automaton has 1945 states and 2101 transitions. Word has length 1645 [2021-11-13 02:38:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:54,158 INFO L470 AbstractCegarLoop]: Abstraction has 1945 states and 2101 transitions. [2021-11-13 02:38:54,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 1.861878453038674) internal successors, (337), 168 states have internal predecessors, (337), 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 02:38:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1945 states and 2101 transitions. [2021-11-13 02:38:54,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1862 [2021-11-13 02:38:54,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:54,195 INFO L514 BasicCegarLoop]: trace histogram [509, 509, 509, 31, 30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1] [2021-11-13 02:38:54,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-13 02:38:54,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:38:54,403 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 02:38:54,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:54,539 INFO L85 PathProgramCache]: Analyzing trace with hash -952480141, now seen corresponding path program 24 times [2021-11-13 02:38:54,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 02:38:54,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911125899] [2021-11-13 02:38:54,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:54,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 02:38:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 407944 backedges. 173362 proven. 35921 refuted. 0 times theorem prover too weak. 198661 trivial. 0 not checked. [2021-11-13 02:38:58,056 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 02:38:58,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911125899] [2021-11-13 02:38:58,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911125899] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 02:38:58,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567231777] [2021-11-13 02:38:58,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 02:38:58,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 02:38:58,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:38:58,058 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 02:38:58,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3c90ea7-e610-46f0-ba1e-61d5d4e183eb/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-13 02:39:01,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 02:39:01,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 02:39:01,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 4265 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-13 02:39:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 407944 backedges. 173413 proven. 35870 refuted. 0 times theorem prover too weak. 198661 trivial. 0 not checked. [2021-11-13 02:39:04,221 INFO L328 TraceCheckSpWp]: Computing backward predicates...