./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E --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 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:47:31,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:47:31,390 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:47:31,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:47:31,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:47:31,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:47:31,428 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:47:31,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:47:31,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:47:31,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:47:31,429 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:47:31,430 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:47:31,430 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:47:31,430 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:47:31,430 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:47:31,430 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:47:31,430 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:47:31,431 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:47:31,431 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:47:31,431 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:47:31,431 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:47:31,431 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:47:31,432 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:47:31,432 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:47:31,432 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:47:31,432 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:47:31,432 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:47:31,432 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:47:31,433 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:47:31,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:47:31,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:47:31,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:47:31,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:47:31,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:47:31,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:47:31,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:47:31,435 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:47:31,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:47:31,435 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:47:31,435 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:47:31,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:47:31,436 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E 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 -> 870f3f117c59e986b23526e49a2d44ed8c8e543941d3d310e77e3939c7927e70 [2024-11-14 02:47:31,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:47:31,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:47:31,828 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:47:31,830 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:47:31,830 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:47:31,834 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c Unable to find full path for "g++" [2024-11-14 02:47:34,152 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:47:34,526 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:47:34,530 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c [2024-11-14 02:47:34,541 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/data/b0aa17520/1c040c84a2cd4dbcb9fd2d5a7c94f4b8/FLAG57c26e927 [2024-11-14 02:47:34,570 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/data/b0aa17520/1c040c84a2cd4dbcb9fd2d5a7c94f4b8 [2024-11-14 02:47:34,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:47:34,577 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:47:34,579 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:47:34,579 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:47:34,590 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:47:34,591 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,592 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2efd42f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34, skipping insertion in model container [2024-11-14 02:47:34,592 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,612 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:47:34,841 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_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2024-11-14 02:47:34,874 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:47:34,888 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:47:34,901 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_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2024-11-14 02:47:34,914 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:47:34,934 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:47:34,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34 WrapperNode [2024-11-14 02:47:34,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:47:34,937 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:47:34,937 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:47:34,938 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:47:34,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,955 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,977 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2024-11-14 02:47:34,978 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:47:34,979 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:47:34,980 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:47:34,980 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:47:34,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,990 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:34,993 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:35,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:35,002 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:35,006 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:35,008 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:47:35,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:47:35,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:47:35,012 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:47:35,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (1/1) ... [2024-11-14 02:47:35,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:47:35,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:35,058 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:47:35,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:47:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:47:35,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:47:35,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:47:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:47:35,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 02:47:35,098 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 02:47:35,173 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:47:35,177 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:47:35,320 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-14 02:47:35,320 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:47:35,368 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:47:35,370 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 02:47:35,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:47:35 BoogieIcfgContainer [2024-11-14 02:47:35,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:47:35,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:47:35,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:47:35,387 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:47:35,388 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:47:34" (1/3) ... [2024-11-14 02:47:35,388 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aefc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:47:35, skipping insertion in model container [2024-11-14 02:47:35,389 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:47:34" (2/3) ... [2024-11-14 02:47:35,390 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aefc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:47:35, skipping insertion in model container [2024-11-14 02:47:35,391 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:47:35" (3/3) ... [2024-11-14 02:47:35,393 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2024-11-14 02:47:35,415 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:47:35,417 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG ps4-ll_unwindbound50.c that has 2 procedures, 15 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 02:47:35,502 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:47:35,525 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;@436dda34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:47:35,525 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:47:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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) [2024-11-14 02:47:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 02:47:35,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:35,540 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 02:47:35,545 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:35,555 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2100386372, now seen corresponding path program 1 times [2024-11-14 02:47:35,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:35,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346488762] [2024-11-14 02:47:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:35,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:35,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346488762] [2024-11-14 02:47:35,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346488762] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:35,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:35,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:47:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974054637] [2024-11-14 02:47:35,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:35,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 02:47:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:35,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 02:47:35,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 02:47:35,789 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2024-11-14 02:47:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:35,822 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2024-11-14 02:47:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 02:47:35,826 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2024-11-14 02:47:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:35,833 INFO L225 Difference]: With dead ends: 29 [2024-11-14 02:47:35,833 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 02:47:35,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 02:47:35,841 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:35,842 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:47:35,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 02:47:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 02:47:35,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:47:35,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2024-11-14 02:47:35,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2024-11-14 02:47:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:35,885 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2024-11-14 02:47:35,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2024-11-14 02:47:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2024-11-14 02:47:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:47:35,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:35,888 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:35,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:47:35,889 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:35,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:35,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1087891836, now seen corresponding path program 1 times [2024-11-14 02:47:35,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:35,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257561625] [2024-11-14 02:47:35,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:35,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:36,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:36,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257561625] [2024-11-14 02:47:36,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257561625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:36,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:36,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:47:36,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077182734] [2024-11-14 02:47:36,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:36,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:47:36,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:47:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:47:36,016 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:36,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:36,050 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2024-11-14 02:47:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:47:36,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:47:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:36,052 INFO L225 Difference]: With dead ends: 23 [2024-11-14 02:47:36,052 INFO L226 Difference]: Without dead ends: 15 [2024-11-14 02:47:36,052 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:47:36,053 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:36,054 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:47:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-11-14 02:47:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-11-14 02:47:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:47:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-11-14 02:47:36,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2024-11-14 02:47:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:36,060 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-11-14 02:47:36,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-11-14 02:47:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:47:36,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:36,061 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:36,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:47:36,061 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:36,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1086104376, now seen corresponding path program 1 times [2024-11-14 02:47:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:36,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267397441] [2024-11-14 02:47:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:47:36,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733039305] [2024-11-14 02:47:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:36,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:36,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:36,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:36,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:47:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:36,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 02:47:36,205 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:36,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:36,360 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 02:47:36,360 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:36,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267397441] [2024-11-14 02:47:36,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:47:36,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733039305] [2024-11-14 02:47:36,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733039305] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:47:36,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:47:36,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 02:47:36,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131287486] [2024-11-14 02:47:36,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:47:36,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 02:47:36,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:36,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 02:47:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 02:47:36,366 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:36,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:36,461 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-11-14 02:47:36,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:47:36,462 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 02:47:36,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:36,463 INFO L225 Difference]: With dead ends: 25 [2024-11-14 02:47:36,464 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 02:47:36,464 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 02:47:36,465 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:36,466 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:47:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 02:47:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 02:47:36,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 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) [2024-11-14 02:47:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-14 02:47:36,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2024-11-14 02:47:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:36,475 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-14 02:47:36,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:47:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-14 02:47:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 02:47:36,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:36,477 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:36,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:47:36,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 02:47:36,681 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:36,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1170848234, now seen corresponding path program 1 times [2024-11-14 02:47:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:36,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559078375] [2024-11-14 02:47:36,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:36,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:36,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:36,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:36,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559078375] [2024-11-14 02:47:36,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559078375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:47:36,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555214272] [2024-11-14 02:47:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:36,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:36,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:36,880 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:36,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:47:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:36,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 02:47:36,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:37,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:37,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555214272] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:47:37,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1374440882] [2024-11-14 02:47:37,180 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 02:47:37,180 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:47:37,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:47:37,190 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:47:37,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:47:39,169 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2024-11-14 02:47:39,531 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:47:41,243 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '329#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_21| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 32768)) (<= |v_ULTIMATE.start_main_#t~post5#1_21| 49) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_10| 32767) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_21|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_10|))) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_11| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_11|) 2)))))) (exists ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8| Int)) (and (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_7|) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| 32767) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_8|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| 32768)) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_7| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 02:47:41,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:47:41,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:47:41,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-14 02:47:41,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113993826] [2024-11-14 02:47:41,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:47:41,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:47:41,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:41,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:47:41,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-11-14 02:47:41,248 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 02:47:41,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:41,408 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2024-11-14 02:47:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:47:41,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 15 [2024-11-14 02:47:41,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:41,410 INFO L225 Difference]: With dead ends: 55 [2024-11-14 02:47:41,410 INFO L226 Difference]: Without dead ends: 47 [2024-11-14 02:47:41,411 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-14 02:47:41,412 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:41,412 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 71 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:47:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-11-14 02:47:41,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-11-14 02:47:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-14 02:47:41,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-11-14 02:47:41,424 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2024-11-14 02:47:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:41,424 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-11-14 02:47:41,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 02:47:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-11-14 02:47:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-14 02:47:41,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:41,426 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:41,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 02:47:41,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:41,627 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:41,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1172635694, now seen corresponding path program 1 times [2024-11-14 02:47:41,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:41,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804148962] [2024-11-14 02:47:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:47:41,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145757904] [2024-11-14 02:47:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:41,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:41,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:41,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:41,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:47:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:41,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:47:41,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:41,880 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:42,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804148962] [2024-11-14 02:47:42,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:47:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145757904] [2024-11-14 02:47:42,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145757904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:47:42,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1543276710] [2024-11-14 02:47:42,010 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-14 02:47:42,011 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:47:42,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:47:42,011 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:47:42,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:47:42,889 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 51 for LOIs [2024-11-14 02:47:42,988 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:47:48,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585#(and (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_main_#t~post5#1_26| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 32768)) (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_19| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_19|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_26|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_23|))))) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_23|) (<= 1 ~counter~0) (<= |v_ULTIMATE.start_main_#t~post5#1_26| 49))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 02:47:48,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:47:48,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:47:48,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2024-11-14 02:47:48,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219170094] [2024-11-14 02:47:48,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:47:48,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 02:47:48,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:48,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 02:47:48,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=318, Unknown=2, NotChecked=0, Total=380 [2024-11-14 02:47:48,240 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:47:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:47:48,354 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2024-11-14 02:47:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:47:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-11-14 02:47:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:47:48,356 INFO L225 Difference]: With dead ends: 57 [2024-11-14 02:47:48,356 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 02:47:48,357 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=68, Invalid=350, Unknown=2, NotChecked=0, Total=420 [2024-11-14 02:47:48,358 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:47:48,358 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 59 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:47:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 02:47:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2024-11-14 02:47:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-14 02:47:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2024-11-14 02:47:48,367 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2024-11-14 02:47:48,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:47:48,368 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2024-11-14 02:47:48,368 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-14 02:47:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2024-11-14 02:47:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 02:47:48,369 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:47:48,369 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 02:47:48,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:47:48,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:48,571 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:47:48,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:47:48,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1524344587, now seen corresponding path program 1 times [2024-11-14 02:47:48,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:47:48,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233485982] [2024-11-14 02:47:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:48,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:47:48,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108616299] [2024-11-14 02:47:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:47:48,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:48,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:48,623 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:48,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:47:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:47:48,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-14 02:47:48,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:47:48,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 02:47:49,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233485982] [2024-11-14 02:47:49,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:47:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108616299] [2024-11-14 02:47:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108616299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:47:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796086322] [2024-11-14 02:47:49,188 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 02:47:49,188 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:47:49,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:47:49,189 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:47:49,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:47:49,906 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2024-11-14 02:47:50,169 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:47:59,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '876#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_34| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| Int)) (and (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_34| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) (* (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_32| Int) (|v_ULTIMATE.start_main_~c~0#1_30| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| 32767) (<= 0 |v_ULTIMATE.start_main_~c~0#1_30|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| 32768)) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31| |v_ULTIMATE.start_main_~c~0#1_30|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_32|) (<= |v_ULTIMATE.start_main_#t~post5#1_32| 49))) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_31|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_37|))))) (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_35| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32| Int)) (and (not (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|)) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|)) (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_35| 4))) (exists ((|v_ULTIMATE.start_main_#t~post5#1_32| Int)) (and (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| 32768)) (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_32|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_38|) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_32|) (<= |v_ULTIMATE.start_main_#t~post5#1_32| 49) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_32| 32767) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_35|)))))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 02:47:59,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:47:59,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:47:59,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-11-14 02:47:59,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714076090] [2024-11-14 02:47:59,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:47:59,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 02:47:59,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:59,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 02:47:59,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=478, Unknown=1, NotChecked=0, Total=552 [2024-11-14 02:47:59,966 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2024-11-14 02:48:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:48:00,202 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-11-14 02:48:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 02:48:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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 21 [2024-11-14 02:48:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:48:00,203 INFO L225 Difference]: With dead ends: 48 [2024-11-14 02:48:00,204 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 02:48:00,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=94, Invalid=607, Unknown=1, NotChecked=0, Total=702 [2024-11-14 02:48:00,205 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:48:00,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:48:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 02:48:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-14 02:48:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-14 02:48:00,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2024-11-14 02:48:00,229 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2024-11-14 02:48:00,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:48:00,229 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2024-11-14 02:48:00,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 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) [2024-11-14 02:48:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2024-11-14 02:48:00,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 02:48:00,230 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:48:00,231 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-14 02:48:00,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 02:48:00,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 02:48:00,431 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:48:00,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:48:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash 300810268, now seen corresponding path program 2 times [2024-11-14 02:48:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:48:00,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184504345] [2024-11-14 02:48:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:48:00,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:48:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:48:00,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 02:48:00,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:48:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184504345] [2024-11-14 02:48:00,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184504345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:48:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781816170] [2024-11-14 02:48:00,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:48:00,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:48:00,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:48:00,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:48:00,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:48:00,797 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:48:00,797 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:48:00,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 02:48:00,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:48:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:48:00,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:48:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 02:48:01,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781816170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:48:01,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [453866978] [2024-11-14 02:48:01,004 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 02:48:01,004 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:48:01,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:48:01,005 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:48:01,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:48:01,589 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 78 for LOIs [2024-11-14 02:48:01,734 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:48:03,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1268#(and (or (exists ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_42| Int)) (and (exists ((|v_ULTIMATE.start_main_#t~post5#1_43| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_42|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| 32767) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_42| 32768)) (<= |v_ULTIMATE.start_main_#t~post5#1_43| 49) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_#t~post5#1_43|) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_45|) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|))) (not (= (* |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_45| 4) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|) (* 2 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_48|))))))) (exists ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| Int) (|v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_42| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 0 (+ |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| 32768)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_BEFORE_CALL_42|) (<= |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39| 32767) (<= 1 ~counter~0) (<= 0 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45|) (not (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_39|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_45|))) (<= 0 |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_39|)))) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 02:48:03,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:48:03,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:48:03,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 16 [2024-11-14 02:48:03,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943474824] [2024-11-14 02:48:03,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:48:03,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 02:48:03,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:48:03,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 02:48:03,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2024-11-14 02:48:03,154 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-14 02:48:03,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:48:03,487 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2024-11-14 02:48:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 02:48:03,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 39 [2024-11-14 02:48:03,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:48:03,489 INFO L225 Difference]: With dead ends: 118 [2024-11-14 02:48:03,489 INFO L226 Difference]: Without dead ends: 113 [2024-11-14 02:48:03,490 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=223, Invalid=833, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 02:48:03,491 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:48:03,492 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 102 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:48:03,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-14 02:48:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2024-11-14 02:48:03,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-14 02:48:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2024-11-14 02:48:03,510 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2024-11-14 02:48:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:48:03,512 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2024-11-14 02:48:03,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 9 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2024-11-14 02:48:03,513 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2024-11-14 02:48:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 02:48:03,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:48:03,514 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2024-11-14 02:48:03,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:48:03,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 02:48:03,714 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:48:03,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:48:03,715 INFO L85 PathProgramCache]: Analyzing trace with hash -987037763, now seen corresponding path program 2 times [2024-11-14 02:48:03,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:48:03,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197624797] [2024-11-14 02:48:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:48:03,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:48:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:48:03,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563048104] [2024-11-14 02:48:03,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:48:03,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:48:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:48:03,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:48:03,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3feca31b-67d0-4bbb-b974-9ee6aeff12aa/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:48:03,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:48:03,859 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:48:03,861 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 02:48:03,863 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:48:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 02:48:04,070 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:48:35,703 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45|))))) is different from true [2024-11-14 02:48:53,751 WARN L873 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| 3)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_55| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_45|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2024-11-14 02:49:01,815 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 [2024-11-14 02:49:11,875 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 [2024-11-14 02:49:21,941 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 [2024-11-14 02:49:32,043 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 [2024-11-14 02:49:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 41 not checked. [2024-11-14 02:49:38,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:49:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197624797] [2024-11-14 02:49:38,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:49:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563048104] [2024-11-14 02:49:38,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563048104] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:49:38,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282825757] [2024-11-14 02:49:38,085 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2024-11-14 02:49:38,085 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:49:38,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:49:38,085 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:49:38,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:49:38,637 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 87 for LOIs [2024-11-14 02:49:38,810 INFO L180 IcfgInterpreter]: Interpretation finished