./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje --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 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:09:13,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:09:13,622 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:09:13,629 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:09:13,630 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:09:13,669 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:09:13,670 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:09:13,670 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:09:13,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:09:13,671 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:09:13,672 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:09:13,672 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:09:13,672 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:09:13,674 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:09:13,675 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:09:13,675 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:09:13,675 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:09:13,676 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:09:13,676 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:09:13,676 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:09:13,677 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:09:13,682 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:09:13,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:09:13,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:09:13,683 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:09:13,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:09:13,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:09:13,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:09:13,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:09:13,685 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:09:13,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:09:13,685 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:09:13,687 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:09:13,688 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:09:13,688 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:09:13,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:09:13,688 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:09:13,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:09:13,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:09:13,689 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:09:13,689 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:09:13,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:09:13,690 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:09:13,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:09:13,691 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:09:13,691 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:09:13,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:09:13,691 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_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2024-11-09 07:09:13,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:09:14,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:09:14,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:09:14,028 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:09:14,028 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:09:14,029 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c Unable to find full path for "g++" [2024-11-09 07:09:16,138 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:09:16,346 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:09:16,347 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2024-11-09 07:09:16,355 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/data/ef0e53995/43ab907154b143b4a07203722e211e70/FLAGc299ea980 [2024-11-09 07:09:16,371 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/data/ef0e53995/43ab907154b143b4a07203722e211e70 [2024-11-09 07:09:16,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:09:16,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:09:16,377 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:09:16,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:09:16,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:09:16,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@513bc3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16, skipping insertion in model container [2024-11-09 07:09:16,386 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:09:16,604 WARN L250 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_87fad1b0-9b31-41e3-82f1-3f3e9f604939/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2024-11-09 07:09:16,631 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:09:16,641 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:09:16,654 WARN L250 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_87fad1b0-9b31-41e3-82f1-3f3e9f604939/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c[458,471] [2024-11-09 07:09:16,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:09:16,685 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:09:16,685 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16 WrapperNode [2024-11-09 07:09:16,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:09:16,687 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:09:16,687 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:09:16,687 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:09:16,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,702 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,720 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 37 [2024-11-09 07:09:16,721 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:09:16,722 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:09:16,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:09:16,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:09:16,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,747 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,748 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:09:16,751 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:09:16,751 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:09:16,751 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:09:16,752 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (1/1) ... [2024-11-09 07:09:16,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:09:16,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:16,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:09:16,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:09:16,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:09:16,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:09:16,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:09:16,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:09:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-09 07:09:16,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-09 07:09:16,900 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:09:16,902 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:09:17,081 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-09 07:09:17,082 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:09:17,145 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:09:17,147 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 07:09:17,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:09:17 BoogieIcfgContainer [2024-11-09 07:09:17,148 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:09:17,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:09:17,155 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:09:17,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:09:17,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:09:16" (1/3) ... [2024-11-09 07:09:17,161 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ada618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:09:17, skipping insertion in model container [2024-11-09 07:09:17,161 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:09:16" (2/3) ... [2024-11-09 07:09:17,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ada618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:09:17, skipping insertion in model container [2024-11-09 07:09:17,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:09:17" (3/3) ... [2024-11-09 07:09:17,164 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2024-11-09 07:09:17,183 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:09:17,184 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:09:17,242 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:09:17,249 INFO L333 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, 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;@6dc86105, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:09:17,249 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:09:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) [2024-11-09 07:09:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 07:09:17,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:17,261 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 07:09:17,262 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:17,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1787187631, now seen corresponding path program 1 times [2024-11-09 07:09:17,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:17,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806043342] [2024-11-09 07:09:17,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:09:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194428382] [2024-11-09 07:09:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:17,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:17,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:17,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:17,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:09:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:17,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 07:09:17,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:17,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:17,701 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:09:17,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:17,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806043342] [2024-11-09 07:09:17,703 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:09:17,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194428382] [2024-11-09 07:09:17,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194428382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:09:17,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:09:17,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:09:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099804409] [2024-11-09 07:09:17,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:09:17,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:09:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:09:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 07:09:17,745 INFO L87 Difference]: Start difference. First operand has 14 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 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) Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:17,878 INFO L93 Difference]: Finished difference Result 37 states and 56 transitions. [2024-11-09 07:09:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:09:17,882 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 07:09:17,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:17,889 INFO L225 Difference]: With dead ends: 37 [2024-11-09 07:09:17,890 INFO L226 Difference]: Without dead ends: 19 [2024-11-09 07:09:17,893 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:09:17,900 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:17,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 32 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:09:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-09 07:09:17,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-09 07:09:17,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 07:09:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-11-09 07:09:17,946 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 6 [2024-11-09 07:09:17,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:17,948 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-11-09 07:09:17,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:09:17,948 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-11-09 07:09:17,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 07:09:17,950 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:17,950 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:17,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 07:09:18,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:18,154 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:18,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1285406957, now seen corresponding path program 1 times [2024-11-09 07:09:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020064947] [2024-11-09 07:09:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:09:18,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279509457] [2024-11-09 07:09:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:18,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:18,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:18,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:18,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:09:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:18,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:09:18,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:18,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:09:18,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 07:09:18,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:18,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020064947] [2024-11-09 07:09:18,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:09:18,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279509457] [2024-11-09 07:09:18,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279509457] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 07:09:18,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:09:18,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-09 07:09:18,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120336182] [2024-11-09 07:09:18,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:09:18,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:09:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:18,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:09:18,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:09:18,509 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 07:09:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:18,571 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-11-09 07:09:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 07:09:18,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-09 07:09:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:18,572 INFO L225 Difference]: With dead ends: 25 [2024-11-09 07:09:18,573 INFO L226 Difference]: Without dead ends: 20 [2024-11-09 07:09:18,573 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-09 07:09:18,575 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:18,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 07:09:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-09 07:09:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-11-09 07:09:18,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 07:09:18,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2024-11-09 07:09:18,585 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 13 [2024-11-09 07:09:18,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:18,586 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2024-11-09 07:09:18,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 07:09:18,587 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2024-11-09 07:09:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-09 07:09:18,587 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:18,588 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 07:09:18,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:18,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:18,792 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:18,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:18,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1503719734, now seen corresponding path program 1 times [2024-11-09 07:09:18,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26577268] [2024-11-09 07:09:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:18,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:09:18,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723037152] [2024-11-09 07:09:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:18,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:18,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:18,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:18,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:09:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:09:18,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 07:09:18,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:09:19,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 07:09:19,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:09:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26577268] [2024-11-09 07:09:19,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:09:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723037152] [2024-11-09 07:09:19,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723037152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:09:19,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242664074] [2024-11-09 07:09:19,536 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 07:09:19,536 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:09:19,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:09:19,546 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:09:19,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:09:20,158 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2024-11-09 07:09:20,284 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:09:21,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '396#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_17| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| Int)) (and (<= 0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12|) (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_17| 4) (+ (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|) 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|))) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12| 100) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|))))) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_18| Int)) (and (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_18|) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_18| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_19|))))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:09:21,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:09:21,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:09:21,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-09 07:09:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430423583] [2024-11-09 07:09:21,383 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:09:21,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 07:09:21,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:09:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 07:09:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-09 07:09:21,390 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:09:21,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:09:21,653 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-11-09 07:09:21,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 07:09:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 19 [2024-11-09 07:09:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:09:21,655 INFO L225 Difference]: With dead ends: 39 [2024-11-09 07:09:21,655 INFO L226 Difference]: Without dead ends: 33 [2024-11-09 07:09:21,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-09 07:09:21,657 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:09:21,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 68 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:09:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-09 07:09:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-09 07:09:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 07:09:21,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2024-11-09 07:09:21,675 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 19 [2024-11-09 07:09:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:09:21,675 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2024-11-09 07:09:21,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-09 07:09:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2024-11-09 07:09:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 07:09:21,677 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:09:21,677 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2024-11-09 07:09:21,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:09:21,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:21,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:09:21,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:09:21,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1961685550, now seen corresponding path program 2 times [2024-11-09 07:09:21,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:09:21,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658618151] [2024-11-09 07:09:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:09:21,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:09:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:09:21,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326486192] [2024-11-09 07:09:21,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 07:09:21,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:09:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:09:21,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:09:21,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:09:21,998 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-09 07:09:21,999 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:09:22,000 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-09 07:09:22,003 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:09:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 07:09:22,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:09:54,385 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_26| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_16|))))) is different from true [2024-11-09 07:10:11,224 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ |c_ULTIMATE.start_main_~c~0#1| (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2024-11-09 07:10:19,298 WARN L851 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false [2024-11-09 07:10:27,397 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 3) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 3))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2024-11-09 07:10:35,454 WARN L851 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 4)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2024-11-09 07:10:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 30 not checked. [2024-11-09 07:10:39,493 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:39,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658618151] [2024-11-09 07:10:39,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:10:39,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326486192] [2024-11-09 07:10:39,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326486192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:39,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993063241] [2024-11-09 07:10:39,497 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 07:10:39,497 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:39,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:39,498 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:39,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:39,873 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2024-11-09 07:10:39,954 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:40,908 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '775#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| Int)) (and (not (= (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40|)) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_29| 4))) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_40|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_29|))) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_25| Int)) (and (<= 0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_25|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|) (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_28| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|) 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_25|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_39|))) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_25| 100)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:10:40,909 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:40,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:10:40,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-11-09 07:10:40,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888139289] [2024-11-09 07:10:40,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:40,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:10:40,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:10:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=443, Unknown=8, NotChecked=230, Total=756 [2024-11-09 07:10:40,912 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:10:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:41,247 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-11-09 07:10:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 07:10:41,249 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 40 [2024-11-09 07:10:41,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:41,250 INFO L225 Difference]: With dead ends: 45 [2024-11-09 07:10:41,250 INFO L226 Difference]: Without dead ends: 39 [2024-11-09 07:10:41,251 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=94, Invalid=620, Unknown=8, NotChecked=270, Total=992 [2024-11-09 07:10:41,256 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:41,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 129 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2024-11-09 07:10:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-09 07:10:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-11-09 07:10:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-09 07:10:41,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-11-09 07:10:41,278 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 40 [2024-11-09 07:10:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:41,279 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-11-09 07:10:41,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-09 07:10:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-11-09 07:10:41,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 07:10:41,280 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:10:41,280 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1] [2024-11-09 07:10:41,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:10:41,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:41,481 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:10:41,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:10:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1922700626, now seen corresponding path program 3 times [2024-11-09 07:10:41,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:10:41,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425108025] [2024-11-09 07:10:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:10:41,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:10:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 07:10:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358082286] [2024-11-09 07:10:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 07:10:41,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:10:41,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:10:41,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:10:41,623 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 07:10:41,624 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 07:10:41,626 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-09 07:10:41,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:10:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 30 proven. 77 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-11-09 07:10:41,994 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:10:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 31 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-09 07:10:42,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:10:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425108025] [2024-11-09 07:10:42,772 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-09 07:10:42,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358082286] [2024-11-09 07:10:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358082286] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:10:42,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [245571783] [2024-11-09 07:10:42,774 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-09 07:10:42,774 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:10:42,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:10:42,775 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:10:42,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:10:43,065 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2024-11-09 07:10:43,130 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:10:44,273 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1267#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65|) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_53| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_65|)))))) (exists ((|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_52| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38| Int)) (and (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38| 100) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64|) (= (+ (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64|)) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_52| 4)) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_64| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38|))) (<= 0 |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38|)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-09 07:10:44,273 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:10:44,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-09 07:10:44,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2024-11-09 07:10:44,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179945207] [2024-11-09 07:10:44,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-09 07:10:44,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 07:10:44,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:10:44,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 07:10:44,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2024-11-09 07:10:44,276 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 07:10:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:10:44,918 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2024-11-09 07:10:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-09 07:10:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 54 [2024-11-09 07:10:44,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:10:44,919 INFO L225 Difference]: With dead ends: 49 [2024-11-09 07:10:44,919 INFO L226 Difference]: Without dead ends: 0 [2024-11-09 07:10:44,920 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2024-11-09 07:10:44,921 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:10:44,921 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 176 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:10:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-09 07:10:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-09 07:10:44,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 07:10:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-09 07:10:44,922 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2024-11-09 07:10:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:10:44,923 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-09 07:10:44,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-09 07:10:44,923 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-09 07:10:44,923 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-09 07:10:44,928 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-09 07:10:44,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:10:45,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:10:45,136 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1] [2024-11-09 07:10:45,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-09 07:10:45,500 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-09 07:10:45,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 07:10:45 BoogieIcfgContainer [2024-11-09 07:10:45,524 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-09 07:10:45,525 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 07:10:45,525 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 07:10:45,525 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 07:10:45,526 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:09:17" (3/4) ... [2024-11-09 07:10:45,528 INFO L142 WitnessPrinter]: Generating witness for correct program [2024-11-09 07:10:45,532 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-09 07:10:45,535 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2024-11-09 07:10:45,535 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-11-09 07:10:45,536 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-09 07:10:45,536 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-09 07:10:45,614 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/witness.graphml [2024-11-09 07:10:45,614 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/witness.yml [2024-11-09 07:10:45,615 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 07:10:45,615 INFO L158 Benchmark]: Toolchain (without parser) took 89240.07ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 100.6MB in the beginning and 159.7MB in the end (delta: -59.1MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2024-11-09 07:10:45,616 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 138.4MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:10:45,616 INFO L158 Benchmark]: CACSL2BoogieTranslator took 309.11ms. Allocated memory is still 138.4MB. Free memory was 100.6MB in the beginning and 88.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 07:10:45,616 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.68ms. Allocated memory is still 138.4MB. Free memory was 88.0MB in the beginning and 86.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 07:10:45,617 INFO L158 Benchmark]: Boogie Preprocessor took 26.75ms. Allocated memory is still 138.4MB. Free memory was 86.7MB in the beginning and 85.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 07:10:45,617 INFO L158 Benchmark]: RCFGBuilder took 397.83ms. Allocated memory is still 138.4MB. Free memory was 85.5MB in the beginning and 73.3MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-11-09 07:10:45,617 INFO L158 Benchmark]: TraceAbstraction took 88371.89ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 72.6MB in the beginning and 165.0MB in the end (delta: -92.4MB). Peak memory consumption was 92.6MB. Max. memory is 16.1GB. [2024-11-09 07:10:45,618 INFO L158 Benchmark]: Witness Printer took 89.88ms. Allocated memory is still 209.7MB. Free memory was 165.0MB in the beginning and 159.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 07:10:45,619 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 138.4MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 309.11ms. Allocated memory is still 138.4MB. Free memory was 100.6MB in the beginning and 88.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.68ms. Allocated memory is still 138.4MB. Free memory was 88.0MB in the beginning and 86.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.75ms. Allocated memory is still 138.4MB. Free memory was 86.7MB in the beginning and 85.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 397.83ms. Allocated memory is still 138.4MB. Free memory was 85.5MB in the beginning and 73.3MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 88371.89ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 72.6MB in the beginning and 165.0MB in the end (delta: -92.4MB). Peak memory consumption was 92.6MB. Max. memory is 16.1GB. * Witness Printer took 89.88ms. Allocated memory is still 209.7MB. Free memory was 165.0MB in the beginning and 159.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 87.9s, OverallIterations: 5, TraceHistogramMax: 8, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 32 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 28 mSDsluCounter, 446 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 139 IncrementalHoareTripleChecker+Unchecked, 392 mSDsCounter, 45 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 502 IncrementalHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 45 mSolverCounterUnsat, 54 mSDtfsCounter, 502 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 383 GetRequests, 258 SyntacticMatches, 23 SemanticMatches, 102 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 24.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=4, InterpolantAutomatonStates: 55, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 79.7s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 249 ConstructedInterpolants, 2 QuantifiedInterpolants, 2276 SizeOfPredicates, 13 NumberOfNonLiveVariables, 434 ConjunctsInSsa, 130 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 300/512 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((y + ((__int128) y * y)) == (c + ((__int128) c * y))) && ((((__int128) k * y) == ((__int128) y * y)) || (c < k))) && ((((__int128) c * 4) + ((__int128) c * y)) == (((__int128) y * 4) + ((__int128) y * y)))) && (((((((__int128) y * y) * y) * 2) + ((((__int128) y * y) * y) * y)) + ((__int128) y * y)) == ((__int128) x * 4))) - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-11-09 07:10:45,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_87fad1b0-9b31-41e3-82f1-3f3e9f604939/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE