./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --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 32bit --witnessprinter.graph.data.programhash a81d76a671fec08918102c7898e8919d02b265d05707efa1508363dab4714d44 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:31:43,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:31:43,734 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 20:31:43,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:31:43,740 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:31:43,797 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:31:43,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:31:43,801 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:31:43,802 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:31:43,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:31:43,805 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:31:43,805 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:31:43,806 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:31:43,813 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:31:43,814 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:31:43,815 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:31:43,816 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:31:43,817 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:31:43,818 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:31:43,831 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:31:43,832 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:31:43,832 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:31:43,833 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:31:43,833 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:31:43,834 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:31:43,834 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:31:43,835 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:31:43,835 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:31:43,836 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:31:43,836 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:31:43,837 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:31:43,837 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 20:31:43,838 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:31:43,838 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:31:43,838 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:31:43,838 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:31:43,839 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:31:43,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:31:43,839 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:31:43,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:43,840 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:31:43,840 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:31:43,841 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:31:43,841 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:31:43,841 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:31:43,841 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:31:43,842 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:31:43,842 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:31:43,842 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:31:43,843 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a81d76a671fec08918102c7898e8919d02b265d05707efa1508363dab4714d44 [2023-11-23 20:31:44,160 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:31:44,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:31:44,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:31:44,201 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:31:44,202 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:31:44,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2023-11-23 20:31:47,304 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:31:47,707 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:31:47,708 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2023-11-23 20:31:47,726 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/data/af05da9f5/57ddb5ee2b36464f83d125fdfb9a4180/FLAGf47114e10 [2023-11-23 20:31:47,743 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/data/af05da9f5/57ddb5ee2b36464f83d125fdfb9a4180 [2023-11-23 20:31:47,746 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:31:47,748 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:31:47,750 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:47,750 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:31:47,757 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:31:47,758 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:47" (1/1) ... [2023-11-23 20:31:47,760 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71db935b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:47, skipping insertion in model container [2023-11-23 20:31:47,760 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:47" (1/1) ... [2023-11-23 20:31:47,813 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:31:48,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:48,293 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:31:48,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:31:48,416 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:31:48,416 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48 WrapperNode [2023-11-23 20:31:48,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:31:48,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:48,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:31:48,419 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:31:48,427 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,448 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,473 INFO L138 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 113 [2023-11-23 20:31:48,474 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:31:48,475 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:31:48,475 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:31:48,475 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:31:48,486 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,504 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,506 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,508 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:31:48,513 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:31:48,513 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:31:48,513 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:31:48,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (1/1) ... [2023-11-23 20:31:48,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:31:48,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:48,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:31:48,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:31:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:31:48,598 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-23 20:31:48,599 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-23 20:31:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:31:48,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:31:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:31:48,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:31:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:31:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:31:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:31:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:31:48,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:31:48,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:31:48,730 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:31:48,733 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:31:48,950 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:31:49,137 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:31:49,137 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-23 20:31:49,139 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:49 BoogieIcfgContainer [2023-11-23 20:31:49,139 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:31:49,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:31:49,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:31:49,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:31:49,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:47" (1/3) ... [2023-11-23 20:31:49,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a93d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:49, skipping insertion in model container [2023-11-23 20:31:49,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:48" (2/3) ... [2023-11-23 20:31:49,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43a93d10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:49, skipping insertion in model container [2023-11-23 20:31:49,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:49" (3/3) ... [2023-11-23 20:31:49,160 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.i [2023-11-23 20:31:49,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:31:49,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-23 20:31:49,255 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:31:49,261 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=LoopHeads, 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;@6818be16, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:31:49,262 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 20:31:49,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-23 20:31:49,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:31:49,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:49,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:49,273 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:31:49,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:49,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1251499724, now seen corresponding path program 1 times [2023-11-23 20:31:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700252705] [2023-11-23 20:31:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:49,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:31:49,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:49,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700252705] [2023-11-23 20:31:49,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700252705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:49,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:49,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202214545] [2023-11-23 20:31:49,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:49,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:31:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:49,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:31:49,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:49,888 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 16 states have internal predecessors, (19), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:31:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:49,984 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-23 20:31:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:31:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-11-23 20:31:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:49,995 INFO L225 Difference]: With dead ends: 33 [2023-11-23 20:31:49,995 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 20:31:49,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:31:50,002 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:50,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 29 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 20:31:50,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2023-11-23 20:31:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 15 states have internal predecessors, (17), 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) [2023-11-23 20:31:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-11-23 20:31:50,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2023-11-23 20:31:50,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:50,047 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-11-23 20:31:50,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:31:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-11-23 20:31:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:31:50,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:50,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:50,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:31:50,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:31:50,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:50,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1239662992, now seen corresponding path program 1 times [2023-11-23 20:31:50,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:50,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389656369] [2023-11-23 20:31:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:31:50,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:50,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389656369] [2023-11-23 20:31:50,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389656369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:50,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096674194] [2023-11-23 20:31:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:50,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:50,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:50,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:50,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:50,198 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:31:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:50,322 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-11-23 20:31:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:31:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2023-11-23 20:31:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:50,324 INFO L225 Difference]: With dead ends: 25 [2023-11-23 20:31:50,324 INFO L226 Difference]: Without dead ends: 23 [2023-11-23 20:31:50,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:50,327 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:50,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-23 20:31:50,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-23 20:31:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:31:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-23 20:31:50,335 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2023-11-23 20:31:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:50,336 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-23 20:31:50,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:31:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-23 20:31:50,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:31:50,338 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:50,338 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:50,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:31:50,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:31:50,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1206714368, now seen corresponding path program 1 times [2023-11-23 20:31:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:50,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199563942] [2023-11-23 20:31:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:50,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:50,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:50,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199563942] [2023-11-23 20:31:50,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199563942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:50,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:31:50,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:31:50,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159690722] [2023-11-23 20:31:50,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:50,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:31:50,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:31:50,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:31:50,549 INFO L87 Difference]: Start difference. First operand 23 states and 26 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, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:31:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:50,671 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-23 20:31:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:31:50,672 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, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-23 20:31:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:50,673 INFO L225 Difference]: With dead ends: 28 [2023-11-23 20:31:50,673 INFO L226 Difference]: Without dead ends: 26 [2023-11-23 20:31:50,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:31:50,675 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 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 [2023-11-23 20:31:50,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:50,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-23 20:31:50,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-23 20:31:50,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:31:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-23 20:31:50,683 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-11-23 20:31:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:50,683 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-23 20:31:50,684 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, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:31:50,684 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-23 20:31:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:31:50,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:50,685 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:50,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:31:50,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:31:50,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:50,686 INFO L85 PathProgramCache]: Analyzing trace with hash -351385322, now seen corresponding path program 1 times [2023-11-23 20:31:50,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:50,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086967793] [2023-11-23 20:31:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:50,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:50,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:50,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086967793] [2023-11-23 20:31:50,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086967793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:31:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841938285] [2023-11-23 20:31:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:50,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:50,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:31:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:51,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:31:51,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:51,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:31:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841938285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:51,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:31:51,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 20:31:51,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699279574] [2023-11-23 20:31:51,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:51,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:31:51,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:51,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:31:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:31:51,332 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:31:51,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:51,450 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-23 20:31:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:31:51,451 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-11-23 20:31:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:51,452 INFO L225 Difference]: With dead ends: 26 [2023-11-23 20:31:51,452 INFO L226 Difference]: Without dead ends: 25 [2023-11-23 20:31:51,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:31:51,454 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:51,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 44 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:51,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-23 20:31:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-23 20:31:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 20:31:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-23 20:31:51,471 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2023-11-23 20:31:51,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:51,472 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-23 20:31:51,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:31:51,472 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-23 20:31:51,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:31:51,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:51,473 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:51,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:31:51,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:51,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:31:51,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:51,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1237637724, now seen corresponding path program 1 times [2023-11-23 20:31:51,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:51,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654989702] [2023-11-23 20:31:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:51,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 20:31:51,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:51,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654989702] [2023-11-23 20:31:51,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654989702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:31:51,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885479318] [2023-11-23 20:31:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:51,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:51,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:51,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:51,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:31:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:52,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:31:52,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 20:31:52,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:31:52,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885479318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:31:52,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:31:52,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 20:31:52,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153696739] [2023-11-23 20:31:52,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:31:52,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:31:52,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:31:52,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:31:52,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:31:52,159 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:31:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:31:52,319 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2023-11-23 20:31:52,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:31:52,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2023-11-23 20:31:52,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:31:52,323 INFO L225 Difference]: With dead ends: 36 [2023-11-23 20:31:52,323 INFO L226 Difference]: Without dead ends: 19 [2023-11-23 20:31:52,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:31:52,325 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:31:52,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:31:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-23 20:31:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-23 20:31:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2023-11-23 20:31:52,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-23 20:31:52,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2023-11-23 20:31:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:31:52,344 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-23 20:31:52,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:31:52,344 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-23 20:31:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:31:52,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:31:52,348 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:31:52,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:31:52,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:52,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:31:52,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:31:52,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1991956989, now seen corresponding path program 1 times [2023-11-23 20:31:52,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:31:52,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029621493] [2023-11-23 20:31:52,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:31:52,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:52,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:31:52,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029621493] [2023-11-23 20:31:52,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029621493] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:31:52,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681712402] [2023-11-23 20:31:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:31:52,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:31:52,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:31:52,790 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:31:52,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:31:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:31:53,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:31:53,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:31:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:53,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:31:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:31:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681712402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:31:53,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86701947] [2023-11-23 20:31:53,192 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-23 20:31:53,193 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:31:53,198 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:31:53,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:31:53,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:32:00,998 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 146 for LOIs [2023-11-23 20:32:01,325 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:32:07,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [86701947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:07,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:32:07,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5, 5, 5] total 22 [2023-11-23 20:32:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501802592] [2023-11-23 20:32:07,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:07,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 20:32:07,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:07,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 20:32:07,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-11-23 20:32:07,127 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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) [2023-11-23 20:32:09,681 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-23 20:32:10,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:10,179 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-11-23 20:32:10,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 20:32:10,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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) Word has length 21 [2023-11-23 20:32:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:10,180 INFO L225 Difference]: With dead ends: 19 [2023-11-23 20:32:10,180 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 20:32:10,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-11-23 20:32:10,182 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:10,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 2 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 20:32:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 20:32:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 20:32:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:32:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 20:32:10,184 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2023-11-23 20:32:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:10,184 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 20:32:10,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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) [2023-11-23 20:32:10,185 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 20:32:10,185 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 20:32:10,187 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2023-11-23 20:32:10,188 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2023-11-23 20:32:10,188 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 4 remaining) [2023-11-23 20:32:10,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 4 remaining) [2023-11-23 20:32:10,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9dbd70e-c17c-47f3-83e1-5671adaad59a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:32:10,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.