./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:06:01,721 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:06:01,877 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:06:01,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:06:01,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:06:01,965 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:06:01,966 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:06:01,967 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:06:01,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:06:01,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:06:01,975 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:06:01,976 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:06:01,976 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:06:01,978 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:06:01,979 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:06:01,979 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:06:01,980 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:06:01,980 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:06:01,981 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:06:01,981 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:06:01,982 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:06:01,984 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:06:01,985 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:06:01,986 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:06:01,986 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:06:01,987 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:06:01,987 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:06:01,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:06:01,988 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:06:01,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:06:01,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:06:01,991 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:06:01,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:06:01,991 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:06:01,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:06:01,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:06:01,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:06:01,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:06:01,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:06:01,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:06:01,993 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:06:02,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:06:02,002 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:06:02,002 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:06:02,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:06:02,002 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_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bf92ba2f935aadbe2c0ae3d366f72b4144ff6b8b5ce7c503e628d249b478be5 [2023-11-19 05:06:02,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:06:02,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:06:02,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:06:02,495 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:06:02,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:06:02,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-11-19 05:06:05,842 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:06:06,225 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:06:06,226 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-11-19 05:06:06,243 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/data/b9a14a476/fca70c5a745440d498fcb27e0f37cb60/FLAGb51c9dda3 [2023-11-19 05:06:06,260 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/data/b9a14a476/fca70c5a745440d498fcb27e0f37cb60 [2023-11-19 05:06:06,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:06:06,265 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:06:06,267 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:06:06,267 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:06:06,273 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:06:06,285 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:06,286 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c26dba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06, skipping insertion in model container [2023-11-19 05:06:06,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:06,347 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:06:06,771 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-11-19 05:06:06,783 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:06:06,799 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:06:06,900 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-11-19 05:06:06,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:06:06,962 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:06:06,962 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06 WrapperNode [2023-11-19 05:06:06,963 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:06:06,964 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:06:06,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:06:06,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:06:06,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,015 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,066 INFO L138 Inliner]: procedures = 129, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 131 [2023-11-19 05:06:07,067 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:06:07,068 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:06:07,068 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:06:07,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:06:07,080 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,136 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,145 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:06:07,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:06:07,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:06:07,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:06:07,153 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (1/1) ... [2023-11-19 05:06:07,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:06:07,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:07,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:06:07,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:06:07,266 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-19 05:06:07,267 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-19 05:06:07,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:06:07,267 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-11-19 05:06:07,268 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-11-19 05:06:07,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:06:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:06:07,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:06:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:06:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:06:07,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:06:07,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:06:07,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:06:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:06:07,520 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:06:07,523 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:06:07,591 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-19 05:06:07,903 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:06:08,016 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:06:08,023 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:06:08,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:06:08 BoogieIcfgContainer [2023-11-19 05:06:08,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:06:08,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:06:08,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:06:08,040 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:06:08,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:06:06" (1/3) ... [2023-11-19 05:06:08,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33411b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:06:08, skipping insertion in model container [2023-11-19 05:06:08,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:06:06" (2/3) ... [2023-11-19 05:06:08,046 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33411b3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:06:08, skipping insertion in model container [2023-11-19 05:06:08,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:06:08" (3/3) ... [2023-11-19 05:06:08,048 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2023-11-19 05:06:08,084 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:06:08,084 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:06:08,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:06:08,171 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;@16b41c7d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:06:08,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:06:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:06:08,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 05:06:08,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:08,183 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:08,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:08,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -523683457, now seen corresponding path program 1 times [2023-11-19 05:06:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:08,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725378277] [2023-11-19 05:06:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:08,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:08,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:08,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725378277] [2023-11-19 05:06:08,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725378277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:08,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253735000] [2023-11-19 05:06:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:08,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:08,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:08,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:08,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:06:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:08,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 05:06:08,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:08,619 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:06:08,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253735000] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:08,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:06:08,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-11-19 05:06:08,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483767498] [2023-11-19 05:06:08,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 05:06:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 05:06:08,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:06:08,697 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 28 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:06:08,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:08,762 INFO L93 Difference]: Finished difference Result 66 states and 94 transitions. [2023-11-19 05:06:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 05:06:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-11-19 05:06:08,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:08,775 INFO L225 Difference]: With dead ends: 66 [2023-11-19 05:06:08,775 INFO L226 Difference]: Without dead ends: 27 [2023-11-19 05:06:08,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 05:06:08,784 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:08,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 05:06:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-19 05:06:08,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-19 05:06:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2023-11-19 05:06:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-11-19 05:06:08,837 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2023-11-19 05:06:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:08,838 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-11-19 05:06:08,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:06:08,839 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-11-19 05:06:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 05:06:08,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:08,841 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:08,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:09,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:09,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:09,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1462078373, now seen corresponding path program 1 times [2023-11-19 05:06:09,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:09,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555100402] [2023-11-19 05:06:09,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:09,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:09,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555100402] [2023-11-19 05:06:09,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555100402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:09,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469031620] [2023-11-19 05:06:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:09,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:09,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:09,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:09,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:06:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:09,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 05:06:09,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:09,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:06:09,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469031620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:09,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:06:09,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2023-11-19 05:06:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642840887] [2023-11-19 05:06:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:09,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 05:06:09,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 05:06:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-11-19 05:06:09,947 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:06:10,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:10,157 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-11-19 05:06:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:06:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-11-19 05:06:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:10,160 INFO L225 Difference]: With dead ends: 49 [2023-11-19 05:06:10,160 INFO L226 Difference]: Without dead ends: 29 [2023-11-19 05:06:10,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-19 05:06:10,163 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:10,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 104 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:10,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-19 05:06:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-19 05:06:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 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) [2023-11-19 05:06:10,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-19 05:06:10,178 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2023-11-19 05:06:10,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:10,183 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-19 05:06:10,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 05:06:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-19 05:06:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 05:06:10,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:10,192 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:10,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:10,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:10,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:10,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:10,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1154701630, now seen corresponding path program 1 times [2023-11-19 05:06:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:10,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674079549] [2023-11-19 05:06:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:10,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:06:10,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674079549] [2023-11-19 05:06:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674079549] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:06:10,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:06:10,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:06:10,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78471299] [2023-11-19 05:06:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:06:10,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:06:10,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:10,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:06:10,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:06:10,723 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-19 05:06:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:10,862 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-11-19 05:06:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 05:06:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 26 [2023-11-19 05:06:10,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:10,865 INFO L225 Difference]: With dead ends: 47 [2023-11-19 05:06:10,865 INFO L226 Difference]: Without dead ends: 44 [2023-11-19 05:06:10,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:06:10,867 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:10,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 98 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 05:06:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-19 05:06:10,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2023-11-19 05:06:10,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2023-11-19 05:06:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2023-11-19 05:06:10,889 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 26 [2023-11-19 05:06:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:10,890 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2023-11-19 05:06:10,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2023-11-19 05:06:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2023-11-19 05:06:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 05:06:10,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:10,892 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:06:10,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:10,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1437635682, now seen corresponding path program 1 times [2023-11-19 05:06:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:10,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059385086] [2023-11-19 05:06:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:11,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:11,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059385086] [2023-11-19 05:06:11,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059385086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:11,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579971449] [2023-11-19 05:06:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:11,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:11,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:06:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:11,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 05:06:11,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:06:11,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 05:06:11,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579971449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:11,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501052022] [2023-11-19 05:06:11,820 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 05:06:11,820 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:11,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:11,833 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:11,833 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:06:13,528 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2023-11-19 05:06:13,668 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:15,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '688#(and (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (exists ((|v_ULTIMATE.start_sll_length_#in~head#1.offset_11| Int) (|v_ULTIMATE.start_main_#t~mem20#1.offset_14| Int)) (and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_length_#res#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |v_ULTIMATE.start_main_#t~mem20#1.offset_14| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|) (= |v_ULTIMATE.start_sll_length_#in~head#1.offset_11| 0))))' at error location [2023-11-19 05:06:15,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:06:15,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2023-11-19 05:06:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515288606] [2023-11-19 05:06:15,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:15,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 05:06:15,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:15,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 05:06:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2023-11-19 05:06:15,719 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:06:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:16,102 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2023-11-19 05:06:16,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 05:06:16,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 27 [2023-11-19 05:06:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:16,107 INFO L225 Difference]: With dead ends: 71 [2023-11-19 05:06:16,107 INFO L226 Difference]: Without dead ends: 49 [2023-11-19 05:06:16,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=144, Invalid=1188, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 05:06:16,110 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:16,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 170 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 05:06:16,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-19 05:06:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2023-11-19 05:06:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 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) [2023-11-19 05:06:16,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-11-19 05:06:16,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 27 [2023-11-19 05:06:16,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:16,121 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-11-19 05:06:16,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:06:16,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-11-19 05:06:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 05:06:16,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:16,123 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:16,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:16,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:16,347 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:16,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:16,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1028628887, now seen corresponding path program 2 times [2023-11-19 05:06:16,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:16,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22094467] [2023-11-19 05:06:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:16,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:06:16,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22094467] [2023-11-19 05:06:16,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22094467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:16,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701421162] [2023-11-19 05:06:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:06:16,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:16,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:16,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:16,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:06:16,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 05:06:16,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:16,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-19 05:06:16,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:17,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-19 05:06:17,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 05:06:17,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 05:06:17,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-19 05:06:17,239 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:17,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:17,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-19 05:06:17,368 INFO L349 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2023-11-19 05:06:17,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 132 [2023-11-19 05:06:17,436 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:06:17,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701421162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:17,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019985710] [2023-11-19 05:06:17,440 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 05:06:17,440 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:17,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:17,441 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:17,441 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:06:18,490 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2023-11-19 05:06:18,617 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:20,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1057#(and (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (exists ((|v_ULTIMATE.start_sll_length_#in~head#1.offset_14| Int) (|v_ULTIMATE.start_main_#t~mem20#1.offset_17| Int)) (and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_length_#res#1|) (= |v_ULTIMATE.start_main_#t~mem20#1.offset_17| 0) (= |v_ULTIMATE.start_sll_length_#in~head#1.offset_14| 0) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))))' at error location [2023-11-19 05:06:20,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:06:20,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:20,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 14 [2023-11-19 05:06:20,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564732066] [2023-11-19 05:06:20,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:20,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 05:06:20,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:20,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 05:06:20,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2023-11-19 05:06:20,572 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:06:21,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:21,113 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-11-19 05:06:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 05:06:21,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-19 05:06:21,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:21,115 INFO L225 Difference]: With dead ends: 62 [2023-11-19 05:06:21,115 INFO L226 Difference]: Without dead ends: 59 [2023-11-19 05:06:21,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2023-11-19 05:06:21,117 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:21,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 232 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:06:21,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-19 05:06:21,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2023-11-19 05:06:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 05:06:21,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2023-11-19 05:06:21,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 31 [2023-11-19 05:06:21,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:21,136 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2023-11-19 05:06:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 05:06:21,136 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2023-11-19 05:06:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 05:06:21,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:21,138 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:21,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:21,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:21,364 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:21,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:21,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1821100905, now seen corresponding path program 3 times [2023-11-19 05:06:21,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:21,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369783742] [2023-11-19 05:06:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:21,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:06:21,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:21,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369783742] [2023-11-19 05:06:21,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369783742] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:21,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153965055] [2023-11-19 05:06:21,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 05:06:21,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:21,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:21,757 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:21,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:06:21,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 05:06:21,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:06:21,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 05:06:21,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:06:22,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 05:06:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153965055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:06:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246233927] [2023-11-19 05:06:22,387 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-11-19 05:06:22,387 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 05:06:22,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 05:06:22,388 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 05:06:22,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 05:06:23,216 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 47 for LOIs [2023-11-19 05:06:23,317 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 05:06:25,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1442#(and (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (not (= (+ |ULTIMATE.start_main_~len~2#1| |ULTIMATE.start_main_~k~0#1|) |ULTIMATE.start_sll_length_#res#1|)) (exists ((|v_ULTIMATE.start_main_#t~mem20#1.offset_20| Int) (|v_ULTIMATE.start_sll_length_#in~head#1.offset_17| Int)) (and (= |ULTIMATE.start_main_~len~2#1| 2) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |v_ULTIMATE.start_main_#t~mem20#1.offset_20| 0) (<= 0 |ULTIMATE.start_sll_length_#res#1|) (= |ULTIMATE.start_main_~k~0#1| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |v_ULTIMATE.start_sll_length_#in~head#1.offset_17| 0) (<= 2 |ULTIMATE.start_main_~#s~0#1.base|))))' at error location [2023-11-19 05:06:25,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-19 05:06:25,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 05:06:25,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 26 [2023-11-19 05:06:25,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292085995] [2023-11-19 05:06:25,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 05:06:25,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-19 05:06:25,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:06:25,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-19 05:06:25,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2023-11-19 05:06:25,361 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 26 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:06:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:06:26,183 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2023-11-19 05:06:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 05:06:26,186 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2023-11-19 05:06:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:06:26,188 INFO L225 Difference]: With dead ends: 120 [2023-11-19 05:06:26,188 INFO L226 Difference]: Without dead ends: 116 [2023-11-19 05:06:26,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=275, Invalid=2481, Unknown=0, NotChecked=0, Total=2756 [2023-11-19 05:06:26,196 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 95 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:06:26,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 380 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:06:26,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-19 05:06:26,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2023-11-19 05:06:26,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 69 states have internal predecessors, (83), 7 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2023-11-19 05:06:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2023-11-19 05:06:26,239 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 32 [2023-11-19 05:06:26,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:06:26,242 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2023-11-19 05:06:26,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:06:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2023-11-19 05:06:26,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 05:06:26,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:06:26,253 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:06:26,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:06:26,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:06:26,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:06:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:06:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 617929687, now seen corresponding path program 4 times [2023-11-19 05:06:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:06:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79659075] [2023-11-19 05:06:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:06:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:06:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 05:06:27,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:06:27,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79659075] [2023-11-19 05:06:27,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79659075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:06:27,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357396989] [2023-11-19 05:06:27,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 05:06:27,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:06:27,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:06:27,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:06:27,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82d85dd4-5559-4d27-a211-182cf2001113/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:06:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:06:27,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-19 05:06:27,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:06:27,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-19 05:06:27,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:06:27,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 05:06:27,657 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 05:06:27,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-19 05:06:27,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-19 05:06:27,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-11-19 05:06:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:06:28,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:06:29,121 INFO L349 Elim1Store]: treesize reduction 11, result has 81.0 percent of original size [2023-11-19 05:06:29,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1572 treesize of output 1554 [2023-11-19 05:06:33,678 INFO L349 Elim1Store]: treesize reduction 1303, result has 39.2 percent of original size [2023-11-19 05:06:33,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 24 new quantified variables, introduced 210 case distinctions, treesize of input 8927 treesize of output 8762