./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:56:28,354 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:56:28,357 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:56:28,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:56:28,387 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:56:28,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:56:28,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:56:28,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:56:28,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:56:28,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:56:28,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:56:28,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:56:28,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:56:28,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:56:28,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:56:28,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:56:28,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:56:28,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:56:28,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:56:28,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:56:28,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:56:28,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:56:28,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:56:28,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:56:28,425 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:56:28,426 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:56:28,426 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:56:28,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:56:28,429 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:56:28,430 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:56:28,431 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:56:28,432 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:56:28,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:56:28,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:56:28,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:56:28,437 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:56:28,438 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:56:28,438 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:56:28,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:56:28,440 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:56:28,441 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:56:28,442 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-03 01:56:28,471 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:56:28,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:56:28,472 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:56:28,472 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:56:28,473 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:56:28,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:56:28,474 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:56:28,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:56:28,475 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:56:28,475 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:56:28,476 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:56:28,476 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:56:28,477 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:56:28,477 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:56:28,477 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:56:28,478 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:56:28,478 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:56:28,479 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:56:28,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:56:28,480 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 01:56:28,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:56:28,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:56:28,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:56:28,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:56:28,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:56:28,483 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-03 01:56:28,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:56:28,484 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:56:28,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:56:28,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:56:28,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:56:28,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:28,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:56:28,486 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:56:28,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:56:28,487 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:56:28,487 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:56:28,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:56:28,488 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:56:28,488 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:56:28,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b4f33979632a981e739ff06b52fe01aa9fb175d5e5193b145052887f22f8a3 [2022-11-03 01:56:28,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:56:28,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:56:28,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:56:28,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:56:28,874 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:56:28,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/termination-numeric/rec_counter3.c [2022-11-03 01:56:28,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/data/c808823ff/eba2e423baf14cbcb7ad9ca80b6b9edf/FLAG5d4ce84ec [2022-11-03 01:56:29,492 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:56:29,492 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/sv-benchmarks/c/termination-numeric/rec_counter3.c [2022-11-03 01:56:29,499 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/data/c808823ff/eba2e423baf14cbcb7ad9ca80b6b9edf/FLAG5d4ce84ec [2022-11-03 01:56:29,865 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/data/c808823ff/eba2e423baf14cbcb7ad9ca80b6b9edf [2022-11-03 01:56:29,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:56:29,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:56:29,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:29,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:56:29,880 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:56:29,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:29" (1/1) ... [2022-11-03 01:56:29,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@415f1eab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:29, skipping insertion in model container [2022-11-03 01:56:29,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:56:29" (1/1) ... [2022-11-03 01:56:29,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:56:29,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:56:30,126 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:30,135 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:56:30,146 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:56:30,155 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:56:30,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30 WrapperNode [2022-11-03 01:56:30,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:56:30,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:30,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:56:30,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:56:30,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,170 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,186 INFO L138 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2022-11-03 01:56:30,186 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:56:30,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:56:30,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:56:30,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:56:30,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,210 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,217 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:56:30,220 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:56:30,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:56:30,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:56:30,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (1/1) ... [2022-11-03 01:56:30,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:56:30,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:30,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:56:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:56:30,306 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2022-11-03 01:56:30,306 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2022-11-03 01:56:30,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:56:30,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:56:30,368 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:56:30,370 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:56:30,555 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:56:30,589 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:56:30,589 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-03 01:56:30,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:30 BoogieIcfgContainer [2022-11-03 01:56:30,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:56:30,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:56:30,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:56:30,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:56:30,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:56:29" (1/3) ... [2022-11-03 01:56:30,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f939461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:30, skipping insertion in model container [2022-11-03 01:56:30,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:56:30" (2/3) ... [2022-11-03 01:56:30,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f939461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:56:30, skipping insertion in model container [2022-11-03 01:56:30,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:56:30" (3/3) ... [2022-11-03 01:56:30,609 INFO L112 eAbstractionObserver]: Analyzing ICFG rec_counter3.c [2022-11-03 01:56:30,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:56:30,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-03 01:56:30,776 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:56:30,795 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@669f81f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:56:30,796 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-03 01:56:30,812 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 01:56:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:56:30,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:30,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-03 01:56:30,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1651969229, now seen corresponding path program 1 times [2022-11-03 01:56:30,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:30,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616466909] [2022-11-03 01:56:30,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:31,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:31,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:31,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616466909] [2022-11-03 01:56:31,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616466909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:31,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:31,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859403874] [2022-11-03 01:56:31,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:31,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:31,208 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.625) internal successors, (26), 22 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:56:31,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:31,322 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-03 01:56:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:31,325 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 [2022-11-03 01:56:31,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:31,333 INFO L225 Difference]: With dead ends: 26 [2022-11-03 01:56:31,333 INFO L226 Difference]: Without dead ends: 21 [2022-11-03 01:56:31,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:56:31,340 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:31,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:31,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-03 01:56:31,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-03 01:56:31,387 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) [2022-11-03 01:56:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-03 01:56:31,389 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 6 [2022-11-03 01:56:31,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:31,390 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-03 01:56:31,390 INFO L496 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) [2022-11-03 01:56:31,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-03 01:56:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:56:31,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:31,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:56:31,392 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:31,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:31,393 INFO L85 PathProgramCache]: Analyzing trace with hash 328561491, now seen corresponding path program 1 times [2022-11-03 01:56:31,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:31,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889109159] [2022-11-03 01:56:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:31,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:31,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:31,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889109159] [2022-11-03 01:56:31,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889109159] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:31,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:31,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:56:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820719036] [2022-11-03 01:56:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:31,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:31,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:31,456 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) [2022-11-03 01:56:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:31,527 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2022-11-03 01:56:31,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:31,528 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 [2022-11-03 01:56:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:31,529 INFO L225 Difference]: With dead ends: 41 [2022-11-03 01:56:31,529 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:56:31,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:56:31,532 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:31,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 66 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:31,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:56:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-11-03 01:56:31,541 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) [2022-11-03 01:56:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-11-03 01:56:31,543 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2022-11-03 01:56:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:31,544 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-11-03 01:56:31,544 INFO L496 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) [2022-11-03 01:56:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-11-03 01:56:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-03 01:56:31,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:31,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:56:31,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1320766167, now seen corresponding path program 1 times [2022-11-03 01:56:31,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566481559] [2022-11-03 01:56:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:31,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:31,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:31,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566481559] [2022-11-03 01:56:31,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566481559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013070516] [2022-11-03 01:56:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:31,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:31,659 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:31,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:56:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:56:31,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:31,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:56:31,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013070516] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:31,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542700079] [2022-11-03 01:56:31,940 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-03 01:56:31,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:31,945 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:31,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:31,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-03 01:56:31,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826475198] [2022-11-03 01:56:31,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:31,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:56:31,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:56:31,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:56:31,951 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) [2022-11-03 01:56:32,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:32,056 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-11-03 01:56:32,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:56:32,057 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 [2022-11-03 01:56:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:32,059 INFO L225 Difference]: With dead ends: 38 [2022-11-03 01:56:32,060 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:56:32,061 INFO L412 NwaCegarLoop]: 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 [2022-11-03 01:56:32,062 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 109 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:32,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 56 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:56:32,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-11-03 01:56:32,078 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) [2022-11-03 01:56:32,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-11-03 01:56:32,082 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 12 [2022-11-03 01:56:32,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:32,084 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-11-03 01:56:32,084 INFO L496 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) [2022-11-03 01:56:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-11-03 01:56:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:56:32,086 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:32,086 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:32,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:32,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:32,302 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -753523798, now seen corresponding path program 1 times [2022-11-03 01:56:32,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:32,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519463964] [2022-11-03 01:56:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:56:32,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:32,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519463964] [2022-11-03 01:56:32,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519463964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:32,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:32,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:56:32,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607167264] [2022-11-03 01:56:32,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:32,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:56:32,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:56:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:56:32,400 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) [2022-11-03 01:56:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:32,425 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2022-11-03 01:56:32,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:32,425 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 [2022-11-03 01:56:32,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:32,426 INFO L225 Difference]: With dead ends: 55 [2022-11-03 01:56:32,427 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 01:56:32,427 INFO L412 NwaCegarLoop]: 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 [2022-11-03 01:56:32,428 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:32,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 72 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:32,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 01:56:32,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-03 01:56:32,436 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) [2022-11-03 01:56:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-03 01:56:32,438 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 15 [2022-11-03 01:56:32,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:32,438 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-03 01:56:32,438 INFO L496 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) [2022-11-03 01:56:32,439 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-03 01:56:32,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:56:32,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:32,439 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:32,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:56:32,440 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:32,441 INFO L85 PathProgramCache]: Analyzing trace with hash -753522458, now seen corresponding path program 1 times [2022-11-03 01:56:32,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:32,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987490456] [2022-11-03 01:56:32,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:32,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:56:32,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:32,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987490456] [2022-11-03 01:56:32,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987490456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:32,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:32,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:56:32,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353391911] [2022-11-03 01:56:32,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:32,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:56:32,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:56:32,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:56:32,495 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) [2022-11-03 01:56:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:32,573 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2022-11-03 01:56:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:56:32,574 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 [2022-11-03 01:56:32,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:32,591 INFO L225 Difference]: With dead ends: 53 [2022-11-03 01:56:32,591 INFO L226 Difference]: Without dead ends: 52 [2022-11-03 01:56:32,591 INFO L412 NwaCegarLoop]: 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 [2022-11-03 01:56:32,593 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:32,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 47 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:32,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-03 01:56:32,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2022-11-03 01:56:32,612 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) [2022-11-03 01:56:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-03 01:56:32,618 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 15 [2022-11-03 01:56:32,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:32,619 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-03 01:56:32,619 INFO L496 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) [2022-11-03 01:56:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-03 01:56:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:56:32,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:32,620 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:32,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:56:32,621 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting recErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1884359658, now seen corresponding path program 1 times [2022-11-03 01:56:32,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:32,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594323585] [2022-11-03 01:56:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:56:32,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:32,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594323585] [2022-11-03 01:56:32,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594323585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:32,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:32,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:56:32,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418458526] [2022-11-03 01:56:32,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:32,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:32,721 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) [2022-11-03 01:56:32,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:32,744 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-11-03 01:56:32,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:32,745 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 [2022-11-03 01:56:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:32,749 INFO L225 Difference]: With dead ends: 41 [2022-11-03 01:56:32,749 INFO L226 Difference]: Without dead ends: 36 [2022-11-03 01:56:32,750 INFO L412 NwaCegarLoop]: 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 [2022-11-03 01:56:32,762 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:32,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:32,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-03 01:56:32,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-03 01:56:32,771 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) [2022-11-03 01:56:32,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-11-03 01:56:32,772 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 16 [2022-11-03 01:56:32,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:32,772 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-11-03 01:56:32,773 INFO L496 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) [2022-11-03 01:56:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-11-03 01:56:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:56:32,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:32,774 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:32,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:56:32,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1142014128, now seen corresponding path program 1 times [2022-11-03 01:56:32,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:32,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830374821] [2022-11-03 01:56:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:32,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:56:33,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:33,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830374821] [2022-11-03 01:56:33,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830374821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:33,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010916547] [2022-11-03 01:56:33,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:33,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:33,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:33,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:56:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:56:33,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:56:33,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:56:33,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010916547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:33,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:56:33,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 13 [2022-11-03 01:56:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966808653] [2022-11-03 01:56:33,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:33,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:56:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:33,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:56:33,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:56:33,220 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:33,304 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-03 01:56:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:56:33,306 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-03 01:56:33,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:33,309 INFO L225 Difference]: With dead ends: 36 [2022-11-03 01:56:33,309 INFO L226 Difference]: Without dead ends: 35 [2022-11-03 01:56:33,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-03 01:56:33,312 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:33,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 71 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-03 01:56:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-03 01:56:33,326 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) [2022-11-03 01:56:33,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-11-03 01:56:33,327 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 26 [2022-11-03 01:56:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:33,328 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-11-03 01:56:33,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 01:56:33,328 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-11-03 01:56:33,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:56:33,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:33,329 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:33,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:33,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:33,554 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting recErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:33,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1042699547, now seen corresponding path program 1 times [2022-11-03 01:56:33,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:33,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304400166] [2022-11-03 01:56:33,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:33,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:56:33,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:33,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304400166] [2022-11-03 01:56:33,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304400166] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:56:33,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:56:33,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:56:33,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761618796] [2022-11-03 01:56:33,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:56:33,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:56:33,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:33,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:56:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:56:33,626 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) [2022-11-03 01:56:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:33,643 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-03 01:56:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:56:33,643 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 [2022-11-03 01:56:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:33,644 INFO L225 Difference]: With dead ends: 35 [2022-11-03 01:56:33,644 INFO L226 Difference]: Without dead ends: 34 [2022-11-03 01:56:33,645 INFO L412 NwaCegarLoop]: 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 [2022-11-03 01:56:33,645 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:33,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:56:33,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-03 01:56:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-03 01:56:33,652 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) [2022-11-03 01:56:33,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-11-03 01:56:33,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 27 [2022-11-03 01:56:33,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:33,653 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-11-03 01:56:33,653 INFO L496 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) [2022-11-03 01:56:33,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-11-03 01:56:33,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 01:56:33,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:33,654 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:56:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 01:56:33,655 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:33,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:33,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1306881789, now seen corresponding path program 1 times [2022-11-03 01:56:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:33,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938013505] [2022-11-03 01:56:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-03 01:56:33,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:33,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938013505] [2022-11-03 01:56:33,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938013505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:33,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277836914] [2022-11-03 01:56:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:33,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:33,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:33,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:33,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:56:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:33,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:56:33,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:56:33,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-03 01:56:34,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277836914] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432372272] [2022-11-03 01:56:34,117 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:34,117 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:34,117 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:34,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:34,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-03 01:56:34,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509925218] [2022-11-03 01:56:34,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:34,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:56:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:34,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:56:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:56:34,129 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) 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) [2022-11-03 01:56:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:34,285 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2022-11-03 01:56:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:56:34,286 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) 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 [2022-11-03 01:56:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:34,290 INFO L225 Difference]: With dead ends: 87 [2022-11-03 01:56:34,291 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 01:56:34,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-03 01:56:34,293 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:34,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 128 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:34,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 01:56:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-11-03 01:56:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 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) [2022-11-03 01:56:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-11-03 01:56:34,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 29 [2022-11-03 01:56:34,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:34,317 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-11-03 01:56:34,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) 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) [2022-11-03 01:56:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-11-03 01:56:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-03 01:56:34,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:34,321 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-03 01:56:34,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:34,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:34,535 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:34,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash 99742118, now seen corresponding path program 2 times [2022-11-03 01:56:34,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:34,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952550623] [2022-11-03 01:56:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:34,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:34,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-03 01:56:34,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:34,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952550623] [2022-11-03 01:56:34,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952550623] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:34,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039573234] [2022-11-03 01:56:34,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:56:34,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:34,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:34,650 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:34,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:56:34,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 01:56:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:56:34,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:34,778 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 01:56:34,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 35 proven. 3 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-03 01:56:34,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039573234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:34,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627002763] [2022-11-03 01:56:34,950 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:34,951 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:34,951 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:34,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:34,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2022-11-03 01:56:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846137886] [2022-11-03 01:56:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:34,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 01:56:34,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 01:56:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:56:34,963 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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) [2022-11-03 01:56:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:35,191 INFO L93 Difference]: Finished difference Result 170 states and 207 transitions. [2022-11-03 01:56:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-03 01:56:35,191 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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 65 [2022-11-03 01:56:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:35,193 INFO L225 Difference]: With dead ends: 170 [2022-11-03 01:56:35,193 INFO L226 Difference]: Without dead ends: 148 [2022-11-03 01:56:35,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:56:35,195 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:35,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 121 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-11-03 01:56:35,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 70. [2022-11-03 01:56:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 61 states have internal predecessors, (74), 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) [2022-11-03 01:56:35,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-11-03 01:56:35,209 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 65 [2022-11-03 01:56:35,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:35,209 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-11-03 01:56:35,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 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) [2022-11-03 01:56:35,209 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-11-03 01:56:35,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 01:56:35,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:35,211 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-03 01:56:35,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:35,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:56:35,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:35,431 INFO L85 PathProgramCache]: Analyzing trace with hash 959256742, now seen corresponding path program 3 times [2022-11-03 01:56:35,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:35,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758951186] [2022-11-03 01:56:35,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:35,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 87 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-11-03 01:56:35,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758951186] [2022-11-03 01:56:35,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758951186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:35,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495079092] [2022-11-03 01:56:35,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:56:35,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:35,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:35,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:56:35,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:56:35,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:56:35,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-03 01:56:35,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:36,181 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 44 proven. 5 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-03 01:56:36,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495079092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:36,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363839715] [2022-11-03 01:56:36,186 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:36,186 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:36,186 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:36,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:36,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 25 [2022-11-03 01:56:36,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180618042] [2022-11-03 01:56:36,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:56:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:56:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-11-03 01:56:36,192 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 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) [2022-11-03 01:56:36,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:36,685 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2022-11-03 01:56:36,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 01:56:36,686 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 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 77 [2022-11-03 01:56:36,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:36,687 INFO L225 Difference]: With dead ends: 197 [2022-11-03 01:56:36,687 INFO L226 Difference]: Without dead ends: 142 [2022-11-03 01:56:36,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=438, Invalid=1724, Unknown=0, NotChecked=0, Total=2162 [2022-11-03 01:56:36,690 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 109 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:36,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 140 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-03 01:56:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 91. [2022-11-03 01:56:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 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) [2022-11-03 01:56:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-11-03 01:56:36,705 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 77 [2022-11-03 01:56:36,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:36,706 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-11-03 01:56:36,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 22 states have internal predecessors, (62), 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) [2022-11-03 01:56:36,707 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-11-03 01:56:36,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-03 01:56:36,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:36,708 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-03 01:56:36,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:36,921 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash -476878298, now seen corresponding path program 4 times [2022-11-03 01:56:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430912864] [2022-11-03 01:56:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:36,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 176 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-03 01:56:37,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:37,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430912864] [2022-11-03 01:56:37,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430912864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:37,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45342926] [2022-11-03 01:56:37,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:56:37,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:37,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:37,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:37,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:56:37,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:37,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-03 01:56:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 164 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 01:56:37,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 164 proven. 35 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-11-03 01:56:38,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45342926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:38,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899353497] [2022-11-03 01:56:38,331 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:38,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:38,332 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:38,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:38,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 21 [2022-11-03 01:56:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755260992] [2022-11-03 01:56:38,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:38,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-03 01:56:38,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-03 01:56:38,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:56:38,334 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 17 states have internal predecessors, (52), 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) [2022-11-03 01:56:38,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:38,554 INFO L93 Difference]: Finished difference Result 135 states and 152 transitions. [2022-11-03 01:56:38,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-03 01:56:38,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 17 states have internal predecessors, (52), 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 89 [2022-11-03 01:56:38,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:38,564 INFO L225 Difference]: With dead ends: 135 [2022-11-03 01:56:38,564 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 01:56:38,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:56:38,566 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:38,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 140 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:38,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 01:56:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-03 01:56:38,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 85 states have internal predecessors, (94), 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) [2022-11-03 01:56:38,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2022-11-03 01:56:38,580 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 89 [2022-11-03 01:56:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:38,580 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2022-11-03 01:56:38,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 17 states have internal predecessors, (52), 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) [2022-11-03 01:56:38,580 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2022-11-03 01:56:38,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-03 01:56:38,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:38,582 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-03 01:56:38,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:38,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 01:56:38,798 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:38,799 INFO L85 PathProgramCache]: Analyzing trace with hash -209634103, now seen corresponding path program 5 times [2022-11-03 01:56:38,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:38,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404008673] [2022-11-03 01:56:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:38,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-03 01:56:39,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404008673] [2022-11-03 01:56:39,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404008673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:39,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337045680] [2022-11-03 01:56:39,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:56:39,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:39,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:39,162 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:39,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:56:39,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-03 01:56:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:56:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-03 01:56:39,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-11-03 01:56:40,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337045680] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:40,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1417284690] [2022-11-03 01:56:40,393 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:40,393 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:40,393 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:40,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:40,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 32 [2022-11-03 01:56:40,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479126759] [2022-11-03 01:56:40,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:40,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 01:56:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 01:56:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2022-11-03 01:56:40,396 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 33 states, 32 states have (on average 2.5625) 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) [2022-11-03 01:56:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:40,728 INFO L93 Difference]: Finished difference Result 338 states and 382 transitions. [2022-11-03 01:56:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 01:56:40,728 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.5625) 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 92 [2022-11-03 01:56:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:40,730 INFO L225 Difference]: With dead ends: 338 [2022-11-03 01:56:40,730 INFO L226 Difference]: Without dead ends: 229 [2022-11-03 01:56:40,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=1504, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 01:56:40,732 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 72 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:40,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 142 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:56:40,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-03 01:56:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 184. [2022-11-03 01:56:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 169 states have (on average 1.0887573964497042) internal successors, (184), 169 states have internal predecessors, (184), 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) [2022-11-03 01:56:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 199 transitions. [2022-11-03 01:56:40,755 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 199 transitions. Word has length 92 [2022-11-03 01:56:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:40,755 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 199 transitions. [2022-11-03 01:56:40,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.5625) 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) [2022-11-03 01:56:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 199 transitions. [2022-11-03 01:56:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-11-03 01:56:40,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:40,759 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:56:40,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:40,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-03 01:56:40,984 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -875264279, now seen corresponding path program 6 times [2022-11-03 01:56:40,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:40,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546653477] [2022-11-03 01:56:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:40,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 975 proven. 51 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2022-11-03 01:56:41,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:41,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546653477] [2022-11-03 01:56:41,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546653477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:41,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773929974] [2022-11-03 01:56:41,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:56:41,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:41,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:41,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:41,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:56:41,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:56:41,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-03 01:56:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 965 proven. 88 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2022-11-03 01:56:42,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2273 backedges. 965 proven. 88 refuted. 0 times theorem prover too weak. 1220 trivial. 0 not checked. [2022-11-03 01:56:44,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773929974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:44,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245559521] [2022-11-03 01:56:44,981 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:44,981 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:44,981 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:44,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:44,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 23, 23] total 30 [2022-11-03 01:56:44,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137783576] [2022-11-03 01:56:44,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-03 01:56:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-03 01:56:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-03 01:56:44,988 INFO L87 Difference]: Start difference. First operand 184 states and 199 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 25 states have internal predecessors, (78), 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) [2022-11-03 01:56:45,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:45,807 INFO L93 Difference]: Finished difference Result 398 states and 437 transitions. [2022-11-03 01:56:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-03 01:56:45,808 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 25 states have internal predecessors, (78), 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 222 [2022-11-03 01:56:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:45,813 INFO L225 Difference]: With dead ends: 398 [2022-11-03 01:56:45,813 INFO L226 Difference]: Without dead ends: 252 [2022-11-03 01:56:45,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 411 SyntacticMatches, 21 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=428, Invalid=2542, Unknown=0, NotChecked=0, Total=2970 [2022-11-03 01:56:45,816 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:45,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 261 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:56:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-03 01:56:45,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 239. [2022-11-03 01:56:45,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 221 states have (on average 1.0769230769230769) internal successors, (238), 221 states have internal predecessors, (238), 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) [2022-11-03 01:56:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 256 transitions. [2022-11-03 01:56:45,841 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 256 transitions. Word has length 222 [2022-11-03 01:56:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:45,842 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 256 transitions. [2022-11-03 01:56:45,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 25 states have internal predecessors, (78), 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) [2022-11-03 01:56:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 256 transitions. [2022-11-03 01:56:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-11-03 01:56:45,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:45,848 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:56:45,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:46,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:46,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:46,058 INFO L85 PathProgramCache]: Analyzing trace with hash 484529193, now seen corresponding path program 7 times [2022-11-03 01:56:46,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:46,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781276862] [2022-11-03 01:56:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1303 proven. 90 refuted. 0 times theorem prover too weak. 1394 trivial. 0 not checked. [2022-11-03 01:56:46,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:46,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781276862] [2022-11-03 01:56:46,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781276862] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:46,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918289139] [2022-11-03 01:56:46,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:56:46,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:46,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:46,899 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:46,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:56:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:47,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-03 01:56:47,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1473 proven. 177 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2022-11-03 01:56:47,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1473 proven. 177 refuted. 0 times theorem prover too weak. 1137 trivial. 0 not checked. [2022-11-03 01:56:51,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918289139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:51,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141147426] [2022-11-03 01:56:51,369 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:51,369 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:51,369 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:51,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:51,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 28, 28] total 37 [2022-11-03 01:56:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384785416] [2022-11-03 01:56:51,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:51,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-03 01:56:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-03 01:56:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 01:56:51,372 INFO L87 Difference]: Start difference. First operand 239 states and 256 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 31 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 01:56:52,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:52,555 INFO L93 Difference]: Finished difference Result 498 states and 537 transitions. [2022-11-03 01:56:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-03 01:56:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 31 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 230 [2022-11-03 01:56:52,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:52,561 INFO L225 Difference]: With dead ends: 498 [2022-11-03 01:56:52,562 INFO L226 Difference]: Without dead ends: 331 [2022-11-03 01:56:52,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 419 SyntacticMatches, 26 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=734, Invalid=4668, Unknown=0, NotChecked=0, Total=5402 [2022-11-03 01:56:52,569 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:52,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 291 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:56:52,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-03 01:56:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 301. [2022-11-03 01:56:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 280 states have (on average 1.0678571428571428) internal successors, (299), 280 states have internal predecessors, (299), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 18 states have call predecessors, (18), 2 states have call successors, (18) [2022-11-03 01:56:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 320 transitions. [2022-11-03 01:56:52,601 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 320 transitions. Word has length 230 [2022-11-03 01:56:52,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:52,602 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 320 transitions. [2022-11-03 01:56:52,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 31 states have internal predecessors, (92), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-03 01:56:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 320 transitions. [2022-11-03 01:56:52,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-11-03 01:56:52,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:52,606 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 40, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:56:52,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:52,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:56:52,822 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:52,823 INFO L85 PathProgramCache]: Analyzing trace with hash -249452762, now seen corresponding path program 8 times [2022-11-03 01:56:52,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:52,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113227581] [2022-11-03 01:56:52,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:52,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:52,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3516 backedges. 1628 proven. 144 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-11-03 01:56:53,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113227581] [2022-11-03 01:56:53,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113227581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:53,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056123679] [2022-11-03 01:56:53,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:56:53,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:53,660 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:53,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:56:53,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-03 01:56:53,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:53,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:56:53,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3516 backedges. 630 proven. 35 refuted. 0 times theorem prover too weak. 2851 trivial. 0 not checked. [2022-11-03 01:56:54,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:56:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3516 backedges. 630 proven. 35 refuted. 0 times theorem prover too weak. 2851 trivial. 0 not checked. [2022-11-03 01:56:54,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056123679] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:56:54,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1736721255] [2022-11-03 01:56:54,770 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:56:54,770 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:56:54,771 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:56:54,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:56:54,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 49 [2022-11-03 01:56:54,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881198474] [2022-11-03 01:56:54,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:56:54,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 01:56:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:56:54,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 01:56:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=2031, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:56:54,778 INFO L87 Difference]: Start difference. First operand 301 states and 320 transitions. Second operand has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 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) [2022-11-03 01:56:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:56:56,502 INFO L93 Difference]: Finished difference Result 844 states and 948 transitions. [2022-11-03 01:56:56,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-03 01:56:56,502 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 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 255 [2022-11-03 01:56:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:56:56,506 INFO L225 Difference]: With dead ends: 844 [2022-11-03 01:56:56,506 INFO L226 Difference]: Without dead ends: 655 [2022-11-03 01:56:56,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1637 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1302, Invalid=6888, Unknown=0, NotChecked=0, Total=8190 [2022-11-03 01:56:56,510 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 333 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:56:56,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 336 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:56:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-11-03 01:56:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 423. [2022-11-03 01:56:56,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 398 states have (on average 1.07035175879397) internal successors, (426), 398 states have internal predecessors, (426), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2022-11-03 01:56:56,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 451 transitions. [2022-11-03 01:56:56,560 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 451 transitions. Word has length 255 [2022-11-03 01:56:56,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:56:56,560 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 451 transitions. [2022-11-03 01:56:56,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9795918367346939) internal successors, (97), 48 states have internal predecessors, (97), 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) [2022-11-03 01:56:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 451 transitions. [2022-11-03 01:56:56,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-11-03 01:56:56,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:56:56,566 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 50, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:56:56,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:56:56,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 01:56:56,789 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:56:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:56:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash 275388998, now seen corresponding path program 9 times [2022-11-03 01:56:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:56:56,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692626794] [2022-11-03 01:56:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:56:56,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:56:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:56:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4842 backedges. 2706 proven. 201 refuted. 0 times theorem prover too weak. 1935 trivial. 0 not checked. [2022-11-03 01:56:57,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:56:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692626794] [2022-11-03 01:56:57,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692626794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:56:57,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130530387] [2022-11-03 01:56:57,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:56:57,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:56:57,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:56:57,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:56:57,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:56:58,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:56:58,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:56:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-03 01:56:58,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:56:58,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4842 backedges. 3071 proven. 499 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2022-11-03 01:56:58,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4842 backedges. 3071 proven. 499 refuted. 0 times theorem prover too weak. 1272 trivial. 0 not checked. [2022-11-03 01:57:04,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130530387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:04,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522641102] [2022-11-03 01:57:04,273 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:57:04,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:04,274 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:57:04,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:04,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 38, 38] total 49 [2022-11-03 01:57:04,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860263118] [2022-11-03 01:57:04,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:04,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-03 01:57:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:04,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-03 01:57:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2022-11-03 01:57:04,277 INFO L87 Difference]: Start difference. First operand 423 states and 451 transitions. Second operand has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 41 states have internal predecessors, (116), 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) [2022-11-03 01:57:06,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:06,834 INFO L93 Difference]: Finished difference Result 864 states and 920 transitions. [2022-11-03 01:57:06,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-03 01:57:06,835 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 41 states have internal predecessors, (116), 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 275 [2022-11-03 01:57:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:06,839 INFO L225 Difference]: With dead ends: 864 [2022-11-03 01:57:06,839 INFO L226 Difference]: Without dead ends: 619 [2022-11-03 01:57:06,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 646 GetRequests, 495 SyntacticMatches, 36 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5052 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1752, Invalid=11820, Unknown=0, NotChecked=0, Total=13572 [2022-11-03 01:57:06,850 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 83 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1979 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:06,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 486 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1979 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:57:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-11-03 01:57:06,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 539. [2022-11-03 01:57:06,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 509 states have (on average 1.0628683693516698) internal successors, (541), 509 states have internal predecessors, (541), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 01:57:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 571 transitions. [2022-11-03 01:57:06,933 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 571 transitions. Word has length 275 [2022-11-03 01:57:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:06,933 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 571 transitions. [2022-11-03 01:57:06,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.36734693877551) internal successors, (116), 41 states have internal predecessors, (116), 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) [2022-11-03 01:57:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 571 transitions. [2022-11-03 01:57:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-11-03 01:57:06,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:06,941 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 53, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:57:06,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:57:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:57:07,162 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:57:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:07,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1628139735, now seen corresponding path program 10 times [2022-11-03 01:57:07,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:07,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178302222] [2022-11-03 01:57:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:07,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:08,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3043 proven. 267 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-03 01:57:08,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178302222] [2022-11-03 01:57:08,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178302222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:08,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741804512] [2022-11-03 01:57:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:57:08,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:08,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:08,591 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:08,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:57:08,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:08,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-03 01:57:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3588 proven. 750 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2022-11-03 01:57:09,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3588 proven. 750 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2022-11-03 01:57:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741804512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376960573] [2022-11-03 01:57:16,413 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:57:16,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:16,413 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:57:16,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:16,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 43, 43] total 56 [2022-11-03 01:57:16,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139698406] [2022-11-03 01:57:16,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:16,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-03 01:57:16,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:16,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-03 01:57:16,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2022-11-03 01:57:16,417 INFO L87 Difference]: Start difference. First operand 539 states and 571 transitions. Second operand has 56 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 47 states have internal predecessors, (130), 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) [2022-11-03 01:57:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:20,060 INFO L93 Difference]: Finished difference Result 1071 states and 1131 transitions. [2022-11-03 01:57:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-03 01:57:20,061 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 47 states have internal predecessors, (130), 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 284 [2022-11-03 01:57:20,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:20,065 INFO L225 Difference]: With dead ends: 1071 [2022-11-03 01:57:20,065 INFO L226 Difference]: Without dead ends: 805 [2022-11-03 01:57:20,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 505 SyntacticMatches, 41 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7543 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2542, Invalid=17480, Unknown=0, NotChecked=0, Total=20022 [2022-11-03 01:57:20,072 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 95 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 3344 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 3362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:20,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 604 Invalid, 3362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3344 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 01:57:20,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-11-03 01:57:20,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 691. [2022-11-03 01:57:20,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 655 states have (on average 1.0564885496183205) internal successors, (692), 655 states have internal predecessors, (692), 3 states have call successors, (3), 2 states have call predecessors, (3), 32 states have return successors, (33), 33 states have call predecessors, (33), 2 states have call successors, (33) [2022-11-03 01:57:20,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 728 transitions. [2022-11-03 01:57:20,160 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 728 transitions. Word has length 284 [2022-11-03 01:57:20,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:20,161 INFO L495 AbstractCegarLoop]: Abstraction has 691 states and 728 transitions. [2022-11-03 01:57:20,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.3214285714285716) internal successors, (130), 47 states have internal predecessors, (130), 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) [2022-11-03 01:57:20,161 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 728 transitions. [2022-11-03 01:57:20,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-11-03 01:57:20,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:20,168 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:57:20,211 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-03 01:57:20,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:57:20,382 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:57:20,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:57:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1486064041, now seen corresponding path program 11 times [2022-11-03 01:57:20,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:57:20,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586607522] [2022-11-03 01:57:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:57:20,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:57:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:57:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5677 backedges. 3842 proven. 1073 refuted. 0 times theorem prover too weak. 762 trivial. 0 not checked. [2022-11-03 01:57:22,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:57:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586607522] [2022-11-03 01:57:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586607522] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:57:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949852242] [2022-11-03 01:57:22,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:57:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:57:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:57:22,290 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:57:22,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:57:22,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-03 01:57:22,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:57:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:57:22,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:57:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5677 backedges. 2370 proven. 377 refuted. 0 times theorem prover too weak. 2930 trivial. 0 not checked. [2022-11-03 01:57:23,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:57:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 5677 backedges. 2370 proven. 377 refuted. 0 times theorem prover too weak. 2930 trivial. 0 not checked. [2022-11-03 01:57:24,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949852242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:57:24,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425783455] [2022-11-03 01:57:24,730 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:57:24,730 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:57:24,730 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:57:24,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:57:24,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 22, 22] total 90 [2022-11-03 01:57:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527497818] [2022-11-03 01:57:24,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:57:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-03 01:57:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:57:24,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-03 01:57:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=7230, Unknown=0, NotChecked=0, Total=8010 [2022-11-03 01:57:24,735 INFO L87 Difference]: Start difference. First operand 691 states and 728 transitions. Second operand has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 78 states have internal predecessors, (191), 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) [2022-11-03 01:57:59,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:57:59,447 INFO L93 Difference]: Finished difference Result 2002 states and 2244 transitions. [2022-11-03 01:57:59,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 789 states. [2022-11-03 01:57:59,447 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 78 states have internal predecessors, (191), 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 290 [2022-11-03 01:57:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:57:59,457 INFO L225 Difference]: With dead ends: 2002 [2022-11-03 01:57:59,457 INFO L226 Difference]: Without dead ends: 1870 [2022-11-03 01:57:59,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1400 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 862 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345033 ImplicationChecksByTransitivity, 33.5s TimeCoverageRelationStatistics Valid=104320, Invalid=641312, Unknown=0, NotChecked=0, Total=745632 [2022-11-03 01:57:59,542 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1025 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 2629 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:57:59,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1025 Valid, 732 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2629 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-03 01:57:59,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2022-11-03 01:57:59,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 787. [2022-11-03 01:57:59,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 750 states have (on average 1.068) internal successors, (801), 750 states have internal predecessors, (801), 3 states have call successors, (3), 2 states have call predecessors, (3), 33 states have return successors, (34), 34 states have call predecessors, (34), 2 states have call successors, (34) [2022-11-03 01:57:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 838 transitions. [2022-11-03 01:57:59,817 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 838 transitions. Word has length 290 [2022-11-03 01:57:59,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:57:59,818 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 838 transitions. [2022-11-03 01:57:59,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.1222222222222222) internal successors, (191), 78 states have internal predecessors, (191), 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) [2022-11-03 01:57:59,819 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 838 transitions. [2022-11-03 01:57:59,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-11-03 01:57:59,824 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:57:59,824 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 14, 13, 13, 13, 13, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-03 01:57:59,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 01:58:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:00,042 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:58:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1579504457, now seen corresponding path program 12 times [2022-11-03 01:58:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461883498] [2022-11-03 01:58:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 8972 backedges. 4371 proven. 2126 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2022-11-03 01:58:02,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:02,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461883498] [2022-11-03 01:58:02,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461883498] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:02,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134855017] [2022-11-03 01:58:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:58:02,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:02,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:02,175 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:02,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:58:02,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:58:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 780 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 01:58:02,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8972 backedges. 4371 proven. 2126 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2022-11-03 01:58:02,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8972 backedges. 4371 proven. 2126 refuted. 0 times theorem prover too weak. 2475 trivial. 0 not checked. [2022-11-03 01:58:08,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134855017] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:08,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [142510014] [2022-11-03 01:58:08,762 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:58:08,762 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:08,762 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:58:08,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:58:08,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 45 [2022-11-03 01:58:08,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431891590] [2022-11-03 01:58:08,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-03 01:58:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-03 01:58:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1729, Unknown=0, NotChecked=0, Total=1980 [2022-11-03 01:58:08,766 INFO L87 Difference]: Start difference. First operand 787 states and 838 transitions. Second operand has 45 states, 45 states have (on average 2.311111111111111) internal successors, (104), 36 states have internal predecessors, (104), 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) [2022-11-03 01:58:10,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:10,498 INFO L93 Difference]: Finished difference Result 1042 states and 1116 transitions. [2022-11-03 01:58:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-11-03 01:58:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.311111111111111) internal successors, (104), 36 states have internal predecessors, (104), 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 348 [2022-11-03 01:58:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:10,501 INFO L225 Difference]: With dead ends: 1042 [2022-11-03 01:58:10,502 INFO L226 Difference]: Without dead ends: 376 [2022-11-03 01:58:10,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 653 SyntacticMatches, 43 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5974 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2983, Invalid=12517, Unknown=0, NotChecked=0, Total=15500 [2022-11-03 01:58:10,508 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 233 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:10,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 180 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:58:10,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-03 01:58:10,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-11-03 01:58:10,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 360 states have (on average 1.0611111111111111) internal successors, (382), 360 states have internal predecessors, (382), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 13 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-03 01:58:10,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 398 transitions. [2022-11-03 01:58:10,573 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 398 transitions. Word has length 348 [2022-11-03 01:58:10,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:10,573 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 398 transitions. [2022-11-03 01:58:10,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.311111111111111) internal successors, (104), 36 states have internal predecessors, (104), 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) [2022-11-03 01:58:10,574 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 398 transitions. [2022-11-03 01:58:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-11-03 01:58:10,577 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:10,577 INFO L195 NwaCegarLoop]: trace histogram [79, 79, 79, 15, 14, 14, 14, 14, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2022-11-03 01:58:10,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:10,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-03 01:58:10,802 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:58:10,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:10,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1032494365, now seen corresponding path program 13 times [2022-11-03 01:58:10,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:10,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385874483] [2022-11-03 01:58:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:10,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:10,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11059 backedges. 4470 proven. 4858 refuted. 0 times theorem prover too weak. 1731 trivial. 0 not checked. [2022-11-03 01:58:14,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385874483] [2022-11-03 01:58:14,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385874483] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:14,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083017845] [2022-11-03 01:58:14,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:58:14,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:14,055 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:14,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:58:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:14,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-03 01:58:14,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 11059 backedges. 4498 proven. 4820 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2022-11-03 01:58:14,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 11059 backedges. 4498 proven. 4820 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2022-11-03 01:58:23,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083017845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:23,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [342009879] [2022-11-03 01:58:23,560 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:58:23,560 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:23,560 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:58:23,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:58:23,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 55, 55] total 59 [2022-11-03 01:58:23,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065766760] [2022-11-03 01:58:23,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:23,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 01:58:23,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:23,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 01:58:23,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=3025, Unknown=0, NotChecked=0, Total=3422 [2022-11-03 01:58:23,565 INFO L87 Difference]: Start difference. First operand 376 states and 398 transitions. Second operand has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 48 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 01:58:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:27,288 INFO L93 Difference]: Finished difference Result 585 states and 630 transitions. [2022-11-03 01:58:27,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-11-03 01:58:27,289 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 48 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) Word has length 383 [2022-11-03 01:58:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:27,292 INFO L225 Difference]: With dead ends: 585 [2022-11-03 01:58:27,292 INFO L226 Difference]: Without dead ends: 412 [2022-11-03 01:58:27,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 939 GetRequests, 711 SyntacticMatches, 53 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12396 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=5524, Invalid=25628, Unknown=0, NotChecked=0, Total=31152 [2022-11-03 01:58:27,298 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 378 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:27,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 216 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:58:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-11-03 01:58:27,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2022-11-03 01:58:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 395 states have (on average 1.0556962025316456) internal successors, (417), 395 states have internal predecessors, (417), 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) [2022-11-03 01:58:27,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 434 transitions. [2022-11-03 01:58:27,359 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 434 transitions. Word has length 383 [2022-11-03 01:58:27,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:27,360 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 434 transitions. [2022-11-03 01:58:27,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2711864406779663) internal successors, (134), 48 states have internal predecessors, (134), 1 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (12), 12 states have call predecessors, (12), 1 states have call successors, (12) [2022-11-03 01:58:27,361 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 434 transitions. [2022-11-03 01:58:27,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-11-03 01:58:27,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:27,366 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 16, 15, 15, 15, 15, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2022-11-03 01:58:27,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:58:27,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:27,583 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:58:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash 105307174, now seen corresponding path program 14 times [2022-11-03 01:58:27,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530201070] [2022-11-03 01:58:27,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:27,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13639 backedges. 9578 proven. 1350 refuted. 0 times theorem prover too weak. 2711 trivial. 0 not checked. [2022-11-03 01:58:30,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:30,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530201070] [2022-11-03 01:58:30,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530201070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:30,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261674169] [2022-11-03 01:58:30,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:58:30,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:30,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:30,984 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:30,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:58:31,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-03 01:58:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:31,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-03 01:58:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13639 backedges. 6516 proven. 1998 refuted. 0 times theorem prover too weak. 5125 trivial. 0 not checked. [2022-11-03 01:58:32,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:35,013 INFO L134 CoverageAnalysis]: Checked inductivity of 13639 backedges. 6516 proven. 1998 refuted. 0 times theorem prover too weak. 5125 trivial. 0 not checked. [2022-11-03 01:58:35,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261674169] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:35,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019878805] [2022-11-03 01:58:35,015 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:58:35,015 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:35,016 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:58:35,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:58:35,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 27, 27] total 106 [2022-11-03 01:58:35,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393431266] [2022-11-03 01:58:35,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:58:35,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-03 01:58:35,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:35,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-03 01:58:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=10062, Unknown=0, NotChecked=0, Total=11130 [2022-11-03 01:58:35,022 INFO L87 Difference]: Start difference. First operand 412 states and 434 transitions. Second operand has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 91 states have internal predecessors, (225), 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) [2022-11-03 01:58:48,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:48,791 INFO L93 Difference]: Finished difference Result 914 states and 1005 transitions. [2022-11-03 01:58:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 302 states. [2022-11-03 01:58:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 91 states have internal predecessors, (225), 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 421 [2022-11-03 01:58:48,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:48,798 INFO L225 Difference]: With dead ends: 914 [2022-11-03 01:58:48,798 INFO L226 Difference]: Without dead ends: 623 [2022-11-03 01:58:48,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1191 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61049 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=24702, Invalid=137304, Unknown=0, NotChecked=0, Total=162006 [2022-11-03 01:58:48,812 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1388 mSDsluCounter, 769 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1388 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:48,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1388 Valid, 763 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 01:58:48,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-11-03 01:58:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 529. [2022-11-03 01:58:48,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 510 states have (on average 1.0666666666666667) internal successors, (544), 510 states have internal predecessors, (544), 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) [2022-11-03 01:58:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 563 transitions. [2022-11-03 01:58:48,898 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 563 transitions. Word has length 421 [2022-11-03 01:58:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:48,899 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 563 transitions. [2022-11-03 01:58:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 91 states have internal predecessors, (225), 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) [2022-11-03 01:58:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 563 transitions. [2022-11-03 01:58:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2022-11-03 01:58:48,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:48,905 INFO L195 NwaCegarLoop]: trace histogram [122, 122, 122, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2022-11-03 01:58:48,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 01:58:49,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:49,122 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:58:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:49,123 INFO L85 PathProgramCache]: Analyzing trace with hash -544461018, now seen corresponding path program 15 times [2022-11-03 01:58:49,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:49,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731999172] [2022-11-03 01:58:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:49,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25144 backedges. 17243 proven. 1824 refuted. 0 times theorem prover too weak. 6077 trivial. 0 not checked. [2022-11-03 01:58:52,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:52,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731999172] [2022-11-03 01:58:52,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731999172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:52,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507984181] [2022-11-03 01:58:52,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 01:58:52,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:52,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:52,689 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:52,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:58:53,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 01:58:53,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:58:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 1211 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 01:58:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 25144 backedges. 17088 proven. 1971 refuted. 0 times theorem prover too weak. 6085 trivial. 0 not checked. [2022-11-03 01:58:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 25144 backedges. 17088 proven. 1971 refuted. 0 times theorem prover too weak. 6085 trivial. 0 not checked. [2022-11-03 01:59:09,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507984181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:09,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [625641429] [2022-11-03 01:59:09,951 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:59:09,951 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:09,951 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:59:09,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:09,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 61 [2022-11-03 01:59:09,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166208744] [2022-11-03 01:59:09,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:09,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-03 01:59:09,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:09,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-03 01:59:09,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=3193, Unknown=0, NotChecked=0, Total=3660 [2022-11-03 01:59:09,961 INFO L87 Difference]: Start difference. First operand 529 states and 563 transitions. Second operand has 61 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 49 states have internal predecessors, (140), 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) [2022-11-03 01:59:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:12,831 INFO L93 Difference]: Finished difference Result 783 states and 850 transitions. [2022-11-03 01:59:12,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-11-03 01:59:12,832 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 49 states have internal predecessors, (140), 1 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (13), 13 states have call predecessors, (13), 1 states have call successors, (13) Word has length 535 [2022-11-03 01:59:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:12,836 INFO L225 Difference]: With dead ends: 783 [2022-11-03 01:59:12,836 INFO L226 Difference]: Without dead ends: 532 [2022-11-03 01:59:12,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1012 SyntacticMatches, 56 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12037 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5754, Invalid=24348, Unknown=0, NotChecked=0, Total=30102 [2022-11-03 01:59:12,841 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 62 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:12,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 291 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:59:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-11-03 01:59:12,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2022-11-03 01:59:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 513 states have (on average 1.060428849902534) internal successors, (544), 513 states have internal predecessors, (544), 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) [2022-11-03 01:59:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 563 transitions. [2022-11-03 01:59:12,924 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 563 transitions. Word has length 535 [2022-11-03 01:59:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:12,924 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 563 transitions. [2022-11-03 01:59:12,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.2950819672131146) internal successors, (140), 49 states have internal predecessors, (140), 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) [2022-11-03 01:59:12,925 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 563 transitions. [2022-11-03 01:59:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-11-03 01:59:12,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:12,930 INFO L195 NwaCegarLoop]: trace histogram [123, 123, 123, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2022-11-03 01:59:12,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:13,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:13,154 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:59:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:13,155 INFO L85 PathProgramCache]: Analyzing trace with hash 539870153, now seen corresponding path program 16 times [2022-11-03 01:59:13,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:13,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847220021] [2022-11-03 01:59:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:13,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:13,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25525 backedges. 11611 proven. 9573 refuted. 0 times theorem prover too weak. 4341 trivial. 0 not checked. [2022-11-03 01:59:16,469 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847220021] [2022-11-03 01:59:16,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847220021] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:16,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052442256] [2022-11-03 01:59:16,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 01:59:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:16,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:16,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:59:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-03 01:59:17,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 25525 backedges. 11645 proven. 9531 refuted. 0 times theorem prover too weak. 4349 trivial. 0 not checked. [2022-11-03 01:59:17,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25525 backedges. 11645 proven. 9531 refuted. 0 times theorem prover too weak. 4349 trivial. 0 not checked. [2022-11-03 01:59:34,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052442256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:34,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1661661401] [2022-11-03 01:59:34,801 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:59:34,802 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:34,802 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:59:34,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:34,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 65] total 68 [2022-11-03 01:59:34,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529598084] [2022-11-03 01:59:34,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:34,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-03 01:59:34,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-03 01:59:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=4045, Unknown=0, NotChecked=0, Total=4556 [2022-11-03 01:59:34,807 INFO L87 Difference]: Start difference. First operand 532 states and 563 transitions. Second operand has 68 states, 68 states have (on average 2.264705882352941) internal successors, (154), 55 states have internal predecessors, (154), 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) [2022-11-03 01:59:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:59:39,838 INFO L93 Difference]: Finished difference Result 828 states and 891 transitions. [2022-11-03 01:59:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-11-03 01:59:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.264705882352941) internal successors, (154), 55 states have internal predecessors, (154), 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 538 [2022-11-03 01:59:39,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:59:39,841 INFO L225 Difference]: With dead ends: 828 [2022-11-03 01:59:39,842 INFO L226 Difference]: Without dead ends: 574 [2022-11-03 01:59:39,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1011 SyntacticMatches, 63 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22787 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=10012, Invalid=44978, Unknown=0, NotChecked=0, Total=54990 [2022-11-03 01:59:39,849 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 451 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:59:39,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 234 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:59:39,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-03 01:59:39,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 574. [2022-11-03 01:59:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 554 states have (on average 1.055956678700361) internal successors, (585), 554 states have internal predecessors, (585), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 01:59:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 605 transitions. [2022-11-03 01:59:39,934 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 605 transitions. Word has length 538 [2022-11-03 01:59:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:59:39,935 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 605 transitions. [2022-11-03 01:59:39,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.264705882352941) internal successors, (154), 55 states have internal predecessors, (154), 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) [2022-11-03 01:59:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 605 transitions. [2022-11-03 01:59:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2022-11-03 01:59:39,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:59:39,941 INFO L195 NwaCegarLoop]: trace histogram [134, 134, 134, 19, 18, 18, 18, 18, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2022-11-03 01:59:39,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-03 01:59:40,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:40,162 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 01:59:40,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:59:40,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1037006132, now seen corresponding path program 17 times [2022-11-03 01:59:40,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:59:40,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222428698] [2022-11-03 01:59:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:59:40,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:59:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:59:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30383 backedges. 21480 proven. 2403 refuted. 0 times theorem prover too weak. 6500 trivial. 0 not checked. [2022-11-03 01:59:43,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:59:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222428698] [2022-11-03 01:59:43,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222428698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:59:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208359936] [2022-11-03 01:59:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:59:43,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:59:43,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:59:43,468 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:59:43,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:59:44,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-03 01:59:44,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:59:44,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-03 01:59:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:59:45,963 INFO L134 CoverageAnalysis]: Checked inductivity of 30383 backedges. 14793 proven. 5534 refuted. 0 times theorem prover too weak. 10056 trivial. 0 not checked. [2022-11-03 01:59:45,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:59:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30383 backedges. 14793 proven. 5534 refuted. 0 times theorem prover too weak. 10056 trivial. 0 not checked. [2022-11-03 01:59:50,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208359936] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:59:50,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651992438] [2022-11-03 01:59:50,315 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 01:59:50,315 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:59:50,316 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 01:59:50,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:59:50,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 34, 34] total 130 [2022-11-03 01:59:50,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547952371] [2022-11-03 01:59:50,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:59:50,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-03 01:59:50,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:59:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-03 01:59:50,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=15259, Unknown=0, NotChecked=0, Total=16770 [2022-11-03 01:59:50,323 INFO L87 Difference]: Start difference. First operand 574 states and 605 transitions. Second operand has 130 states, 130 states have (on average 2.1153846153846154) internal successors, (275), 111 states have internal predecessors, (275), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 02:00:15,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:00:15,238 INFO L93 Difference]: Finished difference Result 1594 states and 1772 transitions. [2022-11-03 02:00:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 460 states. [2022-11-03 02:00:15,239 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.1153846153846154) internal successors, (275), 111 states have internal predecessors, (275), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) Word has length 592 [2022-11-03 02:00:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:00:15,244 INFO L225 Difference]: With dead ends: 1594 [2022-11-03 02:00:15,244 INFO L226 Difference]: Without dead ends: 1126 [2022-11-03 02:00:15,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1701 GetRequests, 1118 SyntacticMatches, 0 SemanticMatches, 583 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137021 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=51714, Invalid=289926, Unknown=0, NotChecked=0, Total=341640 [2022-11-03 02:00:15,269 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 2274 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2274 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:00:15,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2274 Valid, 653 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-03 02:00:15,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2022-11-03 02:00:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 781. [2022-11-03 02:00:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 758 states have (on average 1.0699208443271768) internal successors, (811), 758 states have internal predecessors, (811), 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) [2022-11-03 02:00:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 834 transitions. [2022-11-03 02:00:15,382 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 834 transitions. Word has length 592 [2022-11-03 02:00:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:00:15,382 INFO L495 AbstractCegarLoop]: Abstraction has 781 states and 834 transitions. [2022-11-03 02:00:15,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.1153846153846154) internal successors, (275), 111 states have internal predecessors, (275), 1 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (21), 21 states have call predecessors, (21), 1 states have call successors, (21) [2022-11-03 02:00:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 834 transitions. [2022-11-03 02:00:15,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-11-03 02:00:15,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:00:15,391 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 194, 20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2022-11-03 02:00:15,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-03 02:00:15,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-03 02:00:15,618 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 02:00:15,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:00:15,619 INFO L85 PathProgramCache]: Analyzing trace with hash -2082882458, now seen corresponding path program 18 times [2022-11-03 02:00:15,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:00:15,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057312963] [2022-11-03 02:00:15,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:00:15,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:00:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:00:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61750 backedges. 36629 proven. 732 refuted. 0 times theorem prover too weak. 24389 trivial. 0 not checked. [2022-11-03 02:00:19,087 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:00:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057312963] [2022-11-03 02:00:19,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057312963] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:00:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604644301] [2022-11-03 02:00:19,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:00:19,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:00:19,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:00:19,089 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:00:19,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-03 02:00:20,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:00:20,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:00:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1807 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-03 02:00:20,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:00:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61750 backedges. 40003 proven. 3265 refuted. 0 times theorem prover too weak. 18482 trivial. 0 not checked. [2022-11-03 02:00:21,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:00:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 61750 backedges. 40003 proven. 3265 refuted. 0 times theorem prover too weak. 18482 trivial. 0 not checked. [2022-11-03 02:00:52,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604644301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:00:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339714993] [2022-11-03 02:00:52,417 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:00:52,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:00:52,418 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:00:52,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 68, 68] total 91 [2022-11-03 02:00:52,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47746443] [2022-11-03 02:00:52,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-03 02:00:52,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-03 02:00:52,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=7507, Unknown=0, NotChecked=0, Total=8190 [2022-11-03 02:00:52,422 INFO L87 Difference]: Start difference. First operand 781 states and 834 transitions. Second operand has 91 states, 91 states have (on average 2.197802197802198) internal successors, (200), 77 states have internal predecessors, (200), 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) [2022-11-03 02:01:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:02,712 INFO L93 Difference]: Finished difference Result 1203 states and 1309 transitions. [2022-11-03 02:01:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-11-03 02:01:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.197802197802198) internal successors, (200), 77 states have internal predecessors, (200), 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 795 [2022-11-03 02:01:02,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:02,716 INFO L225 Difference]: With dead ends: 1203 [2022-11-03 02:01:02,716 INFO L226 Difference]: Without dead ends: 787 [2022-11-03 02:01:02,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1848 GetRequests, 1487 SyntacticMatches, 66 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32873 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=10767, Invalid=77145, Unknown=0, NotChecked=0, Total=87912 [2022-11-03 02:01:02,727 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 164 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 6253 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 6271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 6253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:02,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 686 Invalid, 6271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 6253 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:01:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-11-03 02:01:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 787. [2022-11-03 02:01:02,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 764 states have (on average 1.0641361256544504) internal successors, (813), 764 states have internal predecessors, (813), 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) [2022-11-03 02:01:02,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 836 transitions. [2022-11-03 02:01:02,844 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 836 transitions. Word has length 795 [2022-11-03 02:01:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:02,845 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 836 transitions. [2022-11-03 02:01:02,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.197802197802198) internal successors, (200), 77 states have internal predecessors, (200), 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) [2022-11-03 02:01:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 836 transitions. [2022-11-03 02:01:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2022-11-03 02:01:02,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:02,854 INFO L195 NwaCegarLoop]: trace histogram [196, 196, 196, 22, 21, 21, 21, 21, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2022-11-03 02:01:02,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:03,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-03 02:01:03,070 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 02:01:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:03,071 INFO L85 PathProgramCache]: Analyzing trace with hash -993087770, now seen corresponding path program 19 times [2022-11-03 02:01:03,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:03,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997494372] [2022-11-03 02:01:03,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:03,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:03,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 63154 backedges. 44040 proven. 3879 refuted. 0 times theorem prover too weak. 15235 trivial. 0 not checked. [2022-11-03 02:01:09,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997494372] [2022-11-03 02:01:09,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997494372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:09,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843762354] [2022-11-03 02:01:09,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:01:09,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:09,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:09,065 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:09,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-03 02:01:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:10,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-03 02:01:10,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 63154 backedges. 43830 proven. 4083 refuted. 0 times theorem prover too weak. 15241 trivial. 0 not checked. [2022-11-03 02:01:11,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 63154 backedges. 43830 proven. 4083 refuted. 0 times theorem prover too weak. 15241 trivial. 0 not checked. [2022-11-03 02:01:46,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843762354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:46,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [977600707] [2022-11-03 02:01:46,333 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:01:46,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:46,334 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:01:46,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:01:46,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 73] total 76 [2022-11-03 02:01:46,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214051544] [2022-11-03 02:01:46,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:01:46,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-03 02:01:46,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:46,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-03 02:01:46,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=5012, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:01:46,349 INFO L87 Difference]: Start difference. First operand 787 states and 836 transitions. Second operand has 76 states, 76 states have (on average 2.276315789473684) internal successors, (173), 61 states have internal predecessors, (173), 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) [2022-11-03 02:01:52,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:52,063 INFO L93 Difference]: Finished difference Result 1164 states and 1260 transitions. [2022-11-03 02:01:52,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 219 states. [2022-11-03 02:01:52,064 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.276315789473684) internal successors, (173), 61 states have internal predecessors, (173), 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 811 [2022-11-03 02:01:52,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:52,068 INFO L225 Difference]: With dead ends: 1164 [2022-11-03 02:01:52,068 INFO L226 Difference]: Without dead ends: 790 [2022-11-03 02:01:52,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1549 SyntacticMatches, 71 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27058 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=13172, Invalid=54688, Unknown=0, NotChecked=0, Total=67860 [2022-11-03 02:01:52,078 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1982 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:52,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 516 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1982 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:01:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-11-03 02:01:52,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2022-11-03 02:01:52,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 767 states have (on average 1.058670143415906) internal successors, (812), 767 states have internal predecessors, (812), 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) [2022-11-03 02:01:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 835 transitions. [2022-11-03 02:01:52,207 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 835 transitions. Word has length 811 [2022-11-03 02:01:52,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:52,208 INFO L495 AbstractCegarLoop]: Abstraction has 790 states and 835 transitions. [2022-11-03 02:01:52,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.276315789473684) internal successors, (173), 61 states have internal predecessors, (173), 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) [2022-11-03 02:01:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 835 transitions. [2022-11-03 02:01:52,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2022-11-03 02:01:52,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:52,216 INFO L195 NwaCegarLoop]: trace histogram [197, 197, 197, 20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2022-11-03 02:01:52,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-03 02:01:52,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-03 02:01:52,442 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 02:01:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1620924887, now seen corresponding path program 20 times [2022-11-03 02:01:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:52,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955642974] [2022-11-03 02:01:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:52,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:52,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 63562 backedges. 29896 proven. 22294 refuted. 0 times theorem prover too weak. 11372 trivial. 0 not checked. [2022-11-03 02:01:59,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955642974] [2022-11-03 02:01:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955642974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:59,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471400163] [2022-11-03 02:01:59,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:01:59,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:59,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:59,460 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:59,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-03 02:02:01,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-03 02:02:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:02:01,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:02:01,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:02:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 63562 backedges. 28446 proven. 22902 refuted. 0 times theorem prover too weak. 12214 trivial. 0 not checked. [2022-11-03 02:02:03,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:02:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 63562 backedges. 28446 proven. 22902 refuted. 0 times theorem prover too weak. 12214 trivial. 0 not checked. [2022-11-03 02:02:15,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471400163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:02:15,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1437731601] [2022-11-03 02:02:15,614 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:02:15,615 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:02:15,615 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:02:15,616 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:15,616 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 45, 45] total 161 [2022-11-03 02:02:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93775570] [2022-11-03 02:02:15,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-11-03 02:02:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-11-03 02:02:15,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2757, Invalid=23003, Unknown=0, NotChecked=0, Total=25760 [2022-11-03 02:02:15,622 INFO L87 Difference]: Start difference. First operand 790 states and 835 transitions. Second operand has 161 states, 161 states have (on average 2.1614906832298137) internal successors, (348), 136 states have internal predecessors, (348), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-03 02:03:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:03:13,857 INFO L93 Difference]: Finished difference Result 2964 states and 3265 transitions. [2022-11-03 02:03:13,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 747 states. [2022-11-03 02:03:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.1614906832298137) internal successors, (348), 136 states have internal predecessors, (348), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 1 states have call successors, (27) Word has length 804 [2022-11-03 02:03:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:03:13,864 INFO L225 Difference]: With dead ends: 2964 [2022-11-03 02:03:13,864 INFO L226 Difference]: Without dead ends: 2070 [2022-11-03 02:03:13,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2369 GetRequests, 1529 SyntacticMatches, 0 SemanticMatches, 840 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344477 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=160006, Invalid=548116, Unknown=0, NotChecked=0, Total=708122 [2022-11-03 02:03:13,924 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4177 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4177 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 2807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1820 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:03:13,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4177 Valid, 387 Invalid, 2807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-03 02:03:13,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2022-11-03 02:03:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1258. [2022-11-03 02:03:14,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1228 states have (on average 1.0741042345276872) internal successors, (1319), 1228 states have internal predecessors, (1319), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:03:14,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1349 transitions. [2022-11-03 02:03:14,182 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1349 transitions. Word has length 804 [2022-11-03 02:03:14,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:14,183 INFO L495 AbstractCegarLoop]: Abstraction has 1258 states and 1349 transitions. [2022-11-03 02:03:14,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.1614906832298137) internal successors, (348), 136 states have internal predecessors, (348), 1 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (27), 27 states have call predecessors, (27), 1 states have call successors, (27) [2022-11-03 02:03:14,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1349 transitions. [2022-11-03 02:03:14,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2022-11-03 02:03:14,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:14,201 INFO L195 NwaCegarLoop]: trace histogram [336, 336, 336, 29, 28, 28, 28, 28, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2022-11-03 02:03:14,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:14,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-03 02:03:14,416 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 02:03:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:14,417 INFO L85 PathProgramCache]: Analyzing trace with hash 988074156, now seen corresponding path program 21 times [2022-11-03 02:03:14,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:14,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773771086] [2022-11-03 02:03:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:14,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 181447 backedges. 102031 proven. 975 refuted. 0 times theorem prover too weak. 78441 trivial. 0 not checked. [2022-11-03 02:03:21,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:21,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773771086] [2022-11-03 02:03:21,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773771086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:21,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46709141] [2022-11-03 02:03:21,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 02:03:21,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:21,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:21,448 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:21,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-03 02:03:23,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 02:03:23,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:03:23,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 2980 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:03:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 181447 backedges. 100246 proven. 5027 refuted. 0 times theorem prover too weak. 76174 trivial. 0 not checked. [2022-11-03 02:03:25,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:04:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 181447 backedges. 100246 proven. 5027 refuted. 0 times theorem prover too weak. 76174 trivial. 0 not checked. [2022-11-03 02:04:30,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46709141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:04:30,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741249626] [2022-11-03 02:04:30,810 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:04:30,810 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:04:30,810 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:04:30,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:04:30,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 78, 78] total 107 [2022-11-03 02:04:30,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297056406] [2022-11-03 02:04:30,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:04:30,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-11-03 02:04:30,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:04:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-11-03 02:04:30,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=10385, Unknown=0, NotChecked=0, Total=11342 [2022-11-03 02:04:30,816 INFO L87 Difference]: Start difference. First operand 1258 states and 1349 transitions. Second operand has 107 states, 107 states have (on average 2.1682242990654204) internal successors, (232), 91 states have internal predecessors, (232), 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) [2022-11-03 02:04:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:45,569 INFO L93 Difference]: Finished difference Result 2058 states and 2241 transitions. [2022-11-03 02:04:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 287 states. [2022-11-03 02:04:45,570 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.1682242990654204) internal successors, (232), 91 states have internal predecessors, (232), 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 1308 [2022-11-03 02:04:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:04:45,575 INFO L225 Difference]: With dead ends: 2058 [2022-11-03 02:04:45,575 INFO L226 Difference]: Without dead ends: 1267 [2022-11-03 02:04:45,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2943 GetRequests, 2495 SyntacticMatches, 76 SemanticMatches, 372 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53387 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=16939, Invalid=122563, Unknown=0, NotChecked=0, Total=139502 [2022-11-03 02:04:45,585 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 195 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 8817 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 8837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 8817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:04:45,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 738 Invalid, 8837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 8817 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-03 02:04:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-11-03 02:04:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1267. [2022-11-03 02:04:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1237 states have (on average 1.0670978172999193) internal successors, (1320), 1237 states have internal predecessors, (1320), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:04:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1350 transitions. [2022-11-03 02:04:45,846 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1350 transitions. Word has length 1308 [2022-11-03 02:04:45,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:04:45,847 INFO L495 AbstractCegarLoop]: Abstraction has 1267 states and 1350 transitions. [2022-11-03 02:04:45,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.1682242990654204) internal successors, (232), 91 states have internal predecessors, (232), 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) [2022-11-03 02:04:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1350 transitions. [2022-11-03 02:04:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1311 [2022-11-03 02:04:45,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:04:45,863 INFO L195 NwaCegarLoop]: trace histogram [340, 340, 340, 27, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2022-11-03 02:04:45,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-03 02:04:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-03 02:04:46,090 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 02:04:46,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:04:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash -242591636, now seen corresponding path program 22 times [2022-11-03 02:04:46,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:04:46,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056532834] [2022-11-03 02:04:46,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:04:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:04:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 185332 backedges. 105212 proven. 1113 refuted. 0 times theorem prover too weak. 79007 trivial. 0 not checked. [2022-11-03 02:04:54,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:04:54,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056532834] [2022-11-03 02:04:54,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056532834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:04:54,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379078443] [2022-11-03 02:04:54,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-03 02:04:54,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:04:54,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:04:54,750 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:04:54,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-03 02:04:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:04:57,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 2990 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-03 02:04:57,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 185332 backedges. 110949 proven. 6106 refuted. 0 times theorem prover too weak. 68277 trivial. 0 not checked. [2022-11-03 02:05:00,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 185332 backedges. 110949 proven. 6106 refuted. 0 times theorem prover too weak. 68277 trivial. 0 not checked. [2022-11-03 02:06:14,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379078443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:06:14,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407928627] [2022-11-03 02:06:14,067 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:06:14,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:14,067 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:06:14,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:06:14,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 83, 83] total 114 [2022-11-03 02:06:14,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736771465] [2022-11-03 02:06:14,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:14,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-11-03 02:06:14,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:14,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-11-03 02:06:14,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1076, Invalid=11806, Unknown=0, NotChecked=0, Total=12882 [2022-11-03 02:06:14,072 INFO L87 Difference]: Start difference. First operand 1267 states and 1350 transitions. Second operand has 114 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 97 states have internal predecessors, (246), 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) [2022-11-03 02:06:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:32,332 INFO L93 Difference]: Finished difference Result 2025 states and 2192 transitions. [2022-11-03 02:06:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2022-11-03 02:06:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 97 states have internal predecessors, (246), 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 1310 [2022-11-03 02:06:32,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:32,337 INFO L225 Difference]: With dead ends: 2025 [2022-11-03 02:06:32,337 INFO L226 Difference]: Without dead ends: 1276 [2022-11-03 02:06:32,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2985 GetRequests, 2491 SyntacticMatches, 81 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65416 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=20831, Invalid=150979, Unknown=0, NotChecked=0, Total=171810 [2022-11-03 02:06:32,352 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 202 mSDsluCounter, 1061 mSDsCounter, 0 mSdLazyCounter, 10431 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1076 SdHoareTripleChecker+Invalid, 10452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 10431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:32,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1076 Invalid, 10452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 10431 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-03 02:06:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-11-03 02:06:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1276. [2022-11-03 02:06:32,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1246 states have (on average 1.0609951845906902) internal successors, (1322), 1246 states have internal predecessors, (1322), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 27 states have call predecessors, (27), 2 states have call successors, (27) [2022-11-03 02:06:32,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1352 transitions. [2022-11-03 02:06:32,670 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1352 transitions. Word has length 1310 [2022-11-03 02:06:32,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:32,671 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 1352 transitions. [2022-11-03 02:06:32,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.1578947368421053) internal successors, (246), 97 states have internal predecessors, (246), 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) [2022-11-03 02:06:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1352 transitions. [2022-11-03 02:06:32,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1330 [2022-11-03 02:06:32,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:32,689 INFO L195 NwaCegarLoop]: trace histogram [343, 343, 343, 29, 28, 28, 28, 28, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1] [2022-11-03 02:06:32,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:32,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:32,914 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting recErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [recErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, recErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-03 02:06:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:32,915 INFO L85 PathProgramCache]: Analyzing trace with hash -894997117, now seen corresponding path program 23 times [2022-11-03 02:06:32,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:32,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340899366] [2022-11-03 02:06:32,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:32,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 188748 backedges. 107790 proven. 1260 refuted. 0 times theorem prover too weak. 79698 trivial. 0 not checked. [2022-11-03 02:06:42,441 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:42,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340899366] [2022-11-03 02:06:42,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340899366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:42,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675683768] [2022-11-03 02:06:42,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:06:42,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:42,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:42,442 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:42,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_121db8d9-7297-4990-ac06-269f19709746/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-03 02:06:46,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-03 02:06:46,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:06:46,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1957 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-03 02:06:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:49,932 INFO L134 CoverageAnalysis]: Checked inductivity of 188748 backedges. 92563 proven. 49628 refuted. 0 times theorem prover too weak. 46557 trivial. 0 not checked. [2022-11-03 02:06:49,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:13,522 INFO L134 CoverageAnalysis]: Checked inductivity of 188748 backedges. 92563 proven. 49628 refuted. 0 times theorem prover too weak. 46557 trivial. 0 not checked. [2022-11-03 02:07:13,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675683768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:13,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1241324348] [2022-11-03 02:07:13,524 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-03 02:07:13,524 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:07:13,525 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-03 02:07:13,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:07:13,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 56, 56] total 179 [2022-11-03 02:07:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229755893] [2022-11-03 02:07:13,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:13,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-11-03 02:07:13,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:13,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-11-03 02:07:13,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=29007, Unknown=0, NotChecked=0, Total=31862 [2022-11-03 02:07:13,536 INFO L87 Difference]: Start difference. First operand 1276 states and 1352 transitions. Second operand has 179 states, 179 states have (on average 1.905027932960894) internal successors, (341), 164 states have internal predecessors, (341), 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)