./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.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_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/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_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/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_a5a4abe1-96a8-4670-aa7f-06cadbac5909/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 77987d39218daa3d8ca19fe9337f6493b276d704fa95c2d6fb7800ec30efdcea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:38:39,131 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:38:39,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:38:39,221 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:38:39,222 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:38:39,271 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:38:39,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:38:39,273 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:38:39,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:38:39,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:38:39,275 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:38:39,275 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:38:39,275 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:38:39,276 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:38:39,276 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:38:39,278 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:38:39,278 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:38:39,278 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:38:39,278 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:38:39,279 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:38:39,279 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:38:39,279 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:38:39,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:38:39,279 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:38:39,280 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:38:39,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:38:39,280 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:38:39,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:38:39,280 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:38:39,280 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:38:39,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:38:39,281 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:38:39,282 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:38:39,282 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:38:39,282 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:38:39,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:38:39,283 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:38:39,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:38:39,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:38:39,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:38:39,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:38:39,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:38:39,284 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:38:39,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:38:39,285 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:38:39,285 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:38:39,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:38:39,285 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_a5a4abe1-96a8-4670-aa7f-06cadbac5909/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 -> 77987d39218daa3d8ca19fe9337f6493b276d704fa95c2d6fb7800ec30efdcea [2024-11-14 05:38:39,679 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:38:39,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:38:39,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:38:39,701 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:38:39,701 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:38:39,704 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c Unable to find full path for "g++" [2024-11-14 05:38:42,119 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:38:42,421 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:38:42,421 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c [2024-11-14 05:38:42,430 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/data/ba3a56062/cacc1db4df2342ccb1d3ebb817545ff4/FLAGf560fbd0d [2024-11-14 05:38:42,717 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/data/ba3a56062/cacc1db4df2342ccb1d3ebb817545ff4 [2024-11-14 05:38:42,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:38:42,721 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:38:42,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:38:42,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:38:42,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:38:42,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:38:42" (1/1) ... [2024-11-14 05:38:42,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ede82d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:42, skipping insertion in model container [2024-11-14 05:38:42,730 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:38:42" (1/1) ... [2024-11-14 05:38:42,754 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:38:42,988 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_a5a4abe1-96a8-4670-aa7f-06cadbac5909/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2024-11-14 05:38:43,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:38:43,032 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:38:43,045 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_a5a4abe1-96a8-4670-aa7f-06cadbac5909/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2024-11-14 05:38:43,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:38:43,078 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:38:43,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43 WrapperNode [2024-11-14 05:38:43,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:38:43,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:38:43,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:38:43,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:38:43,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,097 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,126 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2024-11-14 05:38:43,127 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:38:43,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:38:43,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:38:43,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:38:43,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,140 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:38:43,168 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:38:43,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:38:43,172 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:38:43,173 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (1/1) ... [2024-11-14 05:38:43,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:38:43,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:43,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:38:43,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:38:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:38:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 05:38:43,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 05:38:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:38:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:38:43,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:38:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-14 05:38:43,279 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-14 05:38:43,379 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:38:43,381 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:38:43,592 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-11-14 05:38:43,592 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:38:43,651 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:38:43,652 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-14 05:38:43,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:38:43 BoogieIcfgContainer [2024-11-14 05:38:43,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:38:43,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:38:43,656 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:38:43,662 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:38:43,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:38:42" (1/3) ... [2024-11-14 05:38:43,663 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67de1132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:38:43, skipping insertion in model container [2024-11-14 05:38:43,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:38:43" (2/3) ... [2024-11-14 05:38:43,664 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67de1132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:38:43, skipping insertion in model container [2024-11-14 05:38:43,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:38:43" (3/3) ... [2024-11-14 05:38:43,666 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.c [2024-11-14 05:38:43,687 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:38:43,689 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd-ll_unwindbound5.c that has 3 procedures, 24 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 05:38:43,769 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:38:43,786 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;@41cdd949, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:38:43,786 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:38:43,794 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-14 05:38:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 05:38:43,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:43,804 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:43,805 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:43,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:43,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1162680393, now seen corresponding path program 1 times [2024-11-14 05:38:43,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:43,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351010823] [2024-11-14 05:38:43,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:43,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:38:44,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:44,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351010823] [2024-11-14 05:38:44,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351010823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:38:44,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:38:44,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:38:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140017716] [2024-11-14 05:38:44,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:38:44,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 05:38:44,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:44,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 05:38:44,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:38:44,090 INFO L87 Difference]: Start difference. First operand has 24 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:38:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:44,144 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2024-11-14 05:38:44,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 05:38:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 13 [2024-11-14 05:38:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:44,153 INFO L225 Difference]: With dead ends: 42 [2024-11-14 05:38:44,154 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 05:38:44,158 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 05:38:44,164 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:44,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:38:44,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 05:38:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 05:38:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 05:38:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-11-14 05:38:44,216 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 13 [2024-11-14 05:38:44,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:44,221 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-11-14 05:38:44,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:38:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-11-14 05:38:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:38:44,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:44,223 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:44,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:38:44,224 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:44,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:44,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1958383332, now seen corresponding path program 1 times [2024-11-14 05:38:44,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:44,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367666117] [2024-11-14 05:38:44,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:38:44,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:44,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367666117] [2024-11-14 05:38:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367666117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:38:44,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:38:44,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:38:44,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248641828] [2024-11-14 05:38:44,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:38:44,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:38:44,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:44,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:38:44,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:38:44,449 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:38:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:44,502 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-11-14 05:38:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:38:44,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-14 05:38:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:44,504 INFO L225 Difference]: With dead ends: 34 [2024-11-14 05:38:44,504 INFO L226 Difference]: Without dead ends: 24 [2024-11-14 05:38:44,505 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 05:38:44,506 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:44,506 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 69 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:38:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-14 05:38:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-14 05:38:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-14 05:38:44,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-14 05:38:44,520 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 14 [2024-11-14 05:38:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:44,521 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-14 05:38:44,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:38:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-14 05:38:44,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:38:44,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:44,525 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:44,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:38:44,526 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:44,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:44,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1960051628, now seen corresponding path program 1 times [2024-11-14 05:38:44,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:44,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175975080] [2024-11-14 05:38:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:44,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:38:44,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945754368] [2024-11-14 05:38:44,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:44,578 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:44,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:38:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:44,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:38:44,685 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:38:44,860 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:38:44,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:44,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175975080] [2024-11-14 05:38:44,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:38:44,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945754368] [2024-11-14 05:38:44,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945754368] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:38:44,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:38:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:38:44,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015294915] [2024-11-14 05:38:44,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:38:44,866 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:38:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:44,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:38:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:38:44,867 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:38:44,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:44,997 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2024-11-14 05:38:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:38:44,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-11-14 05:38:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:44,999 INFO L225 Difference]: With dead ends: 38 [2024-11-14 05:38:44,999 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 05:38:45,000 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 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 05:38:45,001 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:45,001 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 104 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:38:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 05:38:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2024-11-14 05:38:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-14 05:38:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2024-11-14 05:38:45,015 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 14 [2024-11-14 05:38:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:45,016 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2024-11-14 05:38:45,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-14 05:38:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2024-11-14 05:38:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-14 05:38:45,017 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:45,017 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:45,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:38:45,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:45,222 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:45,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:45,223 INFO L85 PathProgramCache]: Analyzing trace with hash -933039579, now seen corresponding path program 1 times [2024-11-14 05:38:45,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:45,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356436350] [2024-11-14 05:38:45,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:45,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:38:45,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4785974] [2024-11-14 05:38:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:45,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:45,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:45,253 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:45,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:38:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:45,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:38:45,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:38:45,508 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:38:45,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356436350] [2024-11-14 05:38:45,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:38:45,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4785974] [2024-11-14 05:38:45,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4785974] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:38:45,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:38:45,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:38:45,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957887538] [2024-11-14 05:38:45,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:38:45,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:38:45,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:45,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:38:45,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:38:45,511 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:38:45,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:45,621 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2024-11-14 05:38:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:38:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2024-11-14 05:38:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:45,625 INFO L225 Difference]: With dead ends: 42 [2024-11-14 05:38:45,625 INFO L226 Difference]: Without dead ends: 40 [2024-11-14 05:38:45,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:38:45,627 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:45,631 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:38:45,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-14 05:38:45,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2024-11-14 05:38:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-14 05:38:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2024-11-14 05:38:45,645 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 19 [2024-11-14 05:38:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:45,645 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2024-11-14 05:38:45,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-14 05:38:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2024-11-14 05:38:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 05:38:45,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:45,646 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:45,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:38:45,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:45,851 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:45,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:45,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1838169868, now seen corresponding path program 1 times [2024-11-14 05:38:45,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:45,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485674431] [2024-11-14 05:38:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:45,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:38:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354760017] [2024-11-14 05:38:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:45,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:45,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:45,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:38:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:45,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 05:38:45,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 05:38:46,112 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:38:46,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:46,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485674431] [2024-11-14 05:38:46,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:38:46,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354760017] [2024-11-14 05:38:46,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354760017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:38:46,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:38:46,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:38:46,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496274825] [2024-11-14 05:38:46,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:38:46,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:38:46,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:38:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:38:46,116 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:38:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:46,200 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2024-11-14 05:38:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:38:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2024-11-14 05:38:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:46,202 INFO L225 Difference]: With dead ends: 46 [2024-11-14 05:38:46,202 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 05:38:46,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:38:46,204 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:46,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 92 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:38:46,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 05:38:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-14 05:38:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-14 05:38:46,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-11-14 05:38:46,217 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 24 [2024-11-14 05:38:46,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:46,218 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-11-14 05:38:46,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-14 05:38:46,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-11-14 05:38:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 05:38:46,219 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:46,219 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:46,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:38:46,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:46,420 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:46,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1441249495, now seen corresponding path program 1 times [2024-11-14 05:38:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058453152] [2024-11-14 05:38:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:38:46,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:46,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058453152] [2024-11-14 05:38:46,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058453152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:38:46,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:38:46,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:38:46,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531883125] [2024-11-14 05:38:46,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:38:46,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:38:46,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:38:46,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:38:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:38:46,701 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-14 05:38:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:38:46,797 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2024-11-14 05:38:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:38:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 30 [2024-11-14 05:38:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:38:46,799 INFO L225 Difference]: With dead ends: 52 [2024-11-14 05:38:46,801 INFO L226 Difference]: Without dead ends: 50 [2024-11-14 05:38:46,802 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 05:38:46,803 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:38:46,804 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:38:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-14 05:38:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2024-11-14 05:38:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-11-14 05:38:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2024-11-14 05:38:46,828 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 30 [2024-11-14 05:38:46,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:38:46,830 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2024-11-14 05:38:46,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-11-14 05:38:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2024-11-14 05:38:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:38:46,831 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:38:46,833 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:38:46,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:38:46,833 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:38:46,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:38:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1448869900, now seen corresponding path program 1 times [2024-11-14 05:38:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:38:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114727084] [2024-11-14 05:38:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:38:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:47,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:38:47,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:38:47,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114727084] [2024-11-14 05:38:47,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114727084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:38:47,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253172336] [2024-11-14 05:38:47,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:38:47,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:38:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:38:47,087 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:38:47,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:38:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:38:47,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 05:38:47,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:38:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:38:47,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:38:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-14 05:38:47,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253172336] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:38:47,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1117995412] [2024-11-14 05:38:47,398 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 05:38:47,399 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:38:47,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:38:47,409 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:38:47,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:38:50,394 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:38:50,408 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:38:50,432 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:38:57,285 WARN L286 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:39:14,737 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1171#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:39:14,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:39:14,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:39:14,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 5] total 10 [2024-11-14 05:39:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245787608] [2024-11-14 05:39:14,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:39:14,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:39:14,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:39:14,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:39:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=488, Unknown=2, NotChecked=0, Total=600 [2024-11-14 05:39:14,740 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:39:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:39:15,016 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2024-11-14 05:39:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:39:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 32 [2024-11-14 05:39:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:39:15,020 INFO L225 Difference]: With dead ends: 109 [2024-11-14 05:39:15,020 INFO L226 Difference]: Without dead ends: 97 [2024-11-14 05:39:15,021 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=123, Invalid=577, Unknown=2, NotChecked=0, Total=702 [2024-11-14 05:39:15,022 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:39:15,022 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 125 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:39:15,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-14 05:39:15,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2024-11-14 05:39:15,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.16) internal successors, (58), 54 states have internal predecessors, (58), 29 states have call successors, (29), 12 states have call predecessors, (29), 11 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-14 05:39:15,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2024-11-14 05:39:15,040 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 32 [2024-11-14 05:39:15,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:39:15,040 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2024-11-14 05:39:15,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 6 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-14 05:39:15,041 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2024-11-14 05:39:15,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-14 05:39:15,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:39:15,042 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:39:15,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:39:15,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:39:15,247 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:39:15,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:39:15,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1450538196, now seen corresponding path program 1 times [2024-11-14 05:39:15,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:39:15,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281844944] [2024-11-14 05:39:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:39:15,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:39:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:39:15,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824098854] [2024-11-14 05:39:15,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:39:15,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:39:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:39:15,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:39:15,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:39:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:39:15,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:39:15,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:39:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 05:39:15,786 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:39:16,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:39:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281844944] [2024-11-14 05:39:16,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:39:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824098854] [2024-11-14 05:39:16,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824098854] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:39:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1181708952] [2024-11-14 05:39:16,300 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 05:39:16,300 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:39:16,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:39:16,300 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:39:16,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:39:17,483 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:39:17,490 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:39:17,506 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:39:34,862 WARN L286 SmtUtils]: Spent 13.58s on a formula simplification. DAG size of input: 106 DAG size of output: 103 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:39:50,319 WARN L286 SmtUtils]: Spent 12.29s on a formula simplification. DAG size of input: 109 DAG size of output: 106 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:40:00,835 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1655#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:40:00,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:40:00,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:40:00,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-11-14 05:40:00,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523645599] [2024-11-14 05:40:00,836 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-14 05:40:00,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-14 05:40:00,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:00,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-14 05:40:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=604, Unknown=4, NotChecked=0, Total=702 [2024-11-14 05:40:00,838 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 05:40:01,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:01,233 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-11-14 05:40:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 05:40:01,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-11-14 05:40:01,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:01,236 INFO L225 Difference]: With dead ends: 97 [2024-11-14 05:40:01,237 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 05:40:01,237 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=101, Invalid=651, Unknown=4, NotChecked=0, Total=756 [2024-11-14 05:40:01,238 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:01,239 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:40:01,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 05:40:01,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-14 05:40:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-14 05:40:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2024-11-14 05:40:01,262 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 32 [2024-11-14 05:40:01,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:01,263 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2024-11-14 05:40:01,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-14 05:40:01,263 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2024-11-14 05:40:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 05:40:01,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:01,268 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:01,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:40:01,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:01,469 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:01,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1744149512, now seen corresponding path program 1 times [2024-11-14 05:40:01,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:01,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224420791] [2024-11-14 05:40:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 05:40:01,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224420791] [2024-11-14 05:40:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224420791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:40:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112486930] [2024-11-14 05:40:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:01,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:01,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:01,863 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:01,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:40:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:40:01,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:40:01,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:40:02,149 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:40:02,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112486930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:40:02,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:40:02,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-11-14 05:40:02,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26327796] [2024-11-14 05:40:02,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:40:02,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:40:02,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:02,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:40:02,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-14 05:40:02,151 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 05:40:02,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:02,293 INFO L93 Difference]: Finished difference Result 97 states and 116 transitions. [2024-11-14 05:40:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 05:40:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 35 [2024-11-14 05:40:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:02,297 INFO L225 Difference]: With dead ends: 97 [2024-11-14 05:40:02,297 INFO L226 Difference]: Without dead ends: 87 [2024-11-14 05:40:02,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-14 05:40:02,298 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:02,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 112 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:40:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-14 05:40:02,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-11-14 05:40:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-14 05:40:02,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2024-11-14 05:40:02,312 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 35 [2024-11-14 05:40:02,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:02,313 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2024-11-14 05:40:02,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-14 05:40:02,313 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2024-11-14 05:40:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 05:40:02,314 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:02,314 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:02,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:40:02,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:02,519 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:02,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -616433155, now seen corresponding path program 2 times [2024-11-14 05:40:02,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:02,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101498044] [2024-11-14 05:40:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:02,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698214670] [2024-11-14 05:40:02,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:40:02,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:02,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:02,561 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:02,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:40:02,631 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:40:02,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:40:02,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:40:02,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-14 05:40:03,317 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:40:03,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:03,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101498044] [2024-11-14 05:40:03,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:03,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698214670] [2024-11-14 05:40:03,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698214670] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:03,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1127348609] [2024-11-14 05:40:03,933 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 05:40:03,933 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:03,934 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:03,934 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:03,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:04,954 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:40:04,965 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:40:04,981 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:40:12,071 WARN L286 SmtUtils]: Spent 5.62s on a formula simplification. DAG size of input: 106 DAG size of output: 102 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:40:23,095 WARN L286 SmtUtils]: Spent 8.43s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:40:30,791 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2625#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:40:30,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:40:30,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:40:30,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2024-11-14 05:40:30,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683008774] [2024-11-14 05:40:30,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:40:30,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:40:30,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:40:30,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:40:30,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=603, Unknown=2, NotChecked=0, Total=702 [2024-11-14 05:40:30,794 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 05:40:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:40:32,102 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2024-11-14 05:40:32,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:40:32,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2024-11-14 05:40:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:40:32,104 INFO L225 Difference]: With dead ends: 97 [2024-11-14 05:40:32,104 INFO L226 Difference]: Without dead ends: 95 [2024-11-14 05:40:32,105 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 26.9s TimeCoverageRelationStatistics Valid=131, Invalid=797, Unknown=2, NotChecked=0, Total=930 [2024-11-14 05:40:32,105 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 16 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:40:32,106 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:40:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-14 05:40:32,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-11-14 05:40:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 58 states have internal predecessors, (61), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-14 05:40:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2024-11-14 05:40:32,128 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 37 [2024-11-14 05:40:32,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:40:32,128 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2024-11-14 05:40:32,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 05:40:32,129 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2024-11-14 05:40:32,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 05:40:32,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:40:32,130 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:40:32,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:40:32,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:40:32,335 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:40:32,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:40:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1332453836, now seen corresponding path program 3 times [2024-11-14 05:40:32,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:40:32,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91603485] [2024-11-14 05:40:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:40:32,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:40:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:40:32,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580166959] [2024-11-14 05:40:32,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:40:32,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:40:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:40:32,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:40:32,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:40:32,433 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:40:32,434 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:40:32,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:40:32,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:40:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:40:32,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:40:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:40:33,430 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:40:33,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91603485] [2024-11-14 05:40:33,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:40:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580166959] [2024-11-14 05:40:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580166959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:40:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [829117615] [2024-11-14 05:40:33,433 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 05:40:33,433 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:40:33,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:40:33,434 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:40:33,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:40:34,513 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:40:34,524 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:40:34,536 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:00,930 WARN L286 SmtUtils]: Spent 18.20s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:41:08,809 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3210#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:41:08,809 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:08,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:41:08,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-14 05:41:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824995297] [2024-11-14 05:41:08,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:08,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 05:41:08,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 05:41:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=430, Unknown=4, NotChecked=0, Total=506 [2024-11-14 05:41:08,811 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-14 05:41:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:09,505 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2024-11-14 05:41:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 05:41:09,506 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 42 [2024-11-14 05:41:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:09,508 INFO L225 Difference]: With dead ends: 105 [2024-11-14 05:41:09,508 INFO L226 Difference]: Without dead ends: 98 [2024-11-14 05:41:09,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=81, Invalid=515, Unknown=4, NotChecked=0, Total=600 [2024-11-14 05:41:09,509 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:09,509 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:41:09,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-14 05:41:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2024-11-14 05:41:09,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 62 states have internal predecessors, (65), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-14 05:41:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2024-11-14 05:41:09,529 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 42 [2024-11-14 05:41:09,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:09,529 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2024-11-14 05:41:09,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2024-11-14 05:41:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2024-11-14 05:41:09,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 05:41:09,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:09,531 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:41:09,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:41:09,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:41:09,731 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:09,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:09,732 INFO L85 PathProgramCache]: Analyzing trace with hash -912528388, now seen corresponding path program 4 times [2024-11-14 05:41:09,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:09,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867807558] [2024-11-14 05:41:09,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:09,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:41:09,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598537757] [2024-11-14 05:41:09,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:41:09,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:09,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:09,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:09,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:41:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:41:09,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:41:09,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 05:41:11,001 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-11-14 05:41:11,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867807558] [2024-11-14 05:41:11,559 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:41:11,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598537757] [2024-11-14 05:41:11,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598537757] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 05:41:11,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:41:11,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2024-11-14 05:41:11,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669329968] [2024-11-14 05:41:11,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:41:11,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:41:11,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:41:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-14 05:41:11,561 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:41:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:11,691 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2024-11-14 05:41:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:41:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-14 05:41:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:11,693 INFO L225 Difference]: With dead ends: 108 [2024-11-14 05:41:11,693 INFO L226 Difference]: Without dead ends: 103 [2024-11-14 05:41:11,694 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-14 05:41:11,694 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 5 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:11,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:41:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-11-14 05:41:11,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2024-11-14 05:41:11,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 61 states have internal predecessors, (64), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 05:41:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2024-11-14 05:41:11,719 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 50 [2024-11-14 05:41:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:11,719 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2024-11-14 05:41:11,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:41:11,720 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2024-11-14 05:41:11,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 05:41:11,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:11,721 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:41:11,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:41:11,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 05:41:11,924 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:11,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1858472992, now seen corresponding path program 1 times [2024-11-14 05:41:11,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:11,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179701350] [2024-11-14 05:41:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:11,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:41:12,268 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 05:41:12,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179701350] [2024-11-14 05:41:12,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179701350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:41:12,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861487708] [2024-11-14 05:41:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:12,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:12,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:12,270 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:12,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:41:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:41:12,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:41:12,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:41:12,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:12,714 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 41 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-14 05:41:12,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861487708] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:41:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [395727581] [2024-11-14 05:41:12,716 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2024-11-14 05:41:12,716 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:12,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:12,717 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:12,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:14,115 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:41:14,122 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:41:14,133 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:41:25,965 WARN L286 SmtUtils]: Spent 10.69s on a formula simplification. DAG size of input: 106 DAG size of output: 104 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:41:42,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4501#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:41:42,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:41:42,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:41:42,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 13 [2024-11-14 05:41:42,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806716641] [2024-11-14 05:41:42,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:41:42,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:41:42,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:41:42,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:41:42,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=692, Unknown=3, NotChecked=0, Total=812 [2024-11-14 05:41:42,264 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 05:41:42,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:41:42,708 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2024-11-14 05:41:42,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:41:42,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 53 [2024-11-14 05:41:42,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:41:42,710 INFO L225 Difference]: With dead ends: 104 [2024-11-14 05:41:42,710 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 05:41:42,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=125, Invalid=742, Unknown=3, NotChecked=0, Total=870 [2024-11-14 05:41:42,711 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:41:42,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:41:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 05:41:42,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2024-11-14 05:41:42,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 59 states have internal predecessors, (60), 20 states have call successors, (20), 14 states have call predecessors, (20), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-14 05:41:42,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2024-11-14 05:41:42,727 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 53 [2024-11-14 05:41:42,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:41:42,728 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2024-11-14 05:41:42,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 6 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2024-11-14 05:41:42,728 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2024-11-14 05:41:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 05:41:42,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:41:42,729 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:41:42,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 05:41:42,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 05:41:42,934 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:41:42,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:41:42,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1083291565, now seen corresponding path program 5 times [2024-11-14 05:41:42,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:41:42,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822994564] [2024-11-14 05:41:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:41:42,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:41:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:41:42,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912813775] [2024-11-14 05:41:42,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:41:42,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:41:42,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:42,975 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:41:42,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:41:43,098 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 05:41:43,098 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:41:43,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:41:43,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:41:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-11-14 05:41:48,799 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:41:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2024-11-14 05:41:55,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:41:55,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822994564] [2024-11-14 05:41:55,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:41:55,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912813775] [2024-11-14 05:41:55,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912813775] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:41:55,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [898247322] [2024-11-14 05:41:55,036 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 05:41:55,037 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:41:55,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:41:55,037 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:41:55,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:41:55,802 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:41:55,813 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:41:55,828 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:42:18,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5276#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:42:18,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:42:18,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:42:18,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2024-11-14 05:42:18,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612109670] [2024-11-14 05:42:18,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:42:18,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:42:18,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:18,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:42:18,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=807, Unknown=3, NotChecked=0, Total=930 [2024-11-14 05:42:18,980 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-14 05:42:28,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:28,099 INFO L93 Difference]: Finished difference Result 140 states and 180 transitions. [2024-11-14 05:42:28,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:42:28,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 73 [2024-11-14 05:42:28,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:28,102 INFO L225 Difference]: With dead ends: 140 [2024-11-14 05:42:28,102 INFO L226 Difference]: Without dead ends: 138 [2024-11-14 05:42:28,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 32.1s TimeCoverageRelationStatistics Valid=188, Invalid=1141, Unknown=3, NotChecked=0, Total=1332 [2024-11-14 05:42:28,103 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 43 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:28,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 321 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-14 05:42:28,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-14 05:42:28,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2024-11-14 05:42:28,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 72 states have internal predecessors, (78), 31 states have call successors, (31), 15 states have call predecessors, (31), 15 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-14 05:42:28,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 139 transitions. [2024-11-14 05:42:28,139 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 139 transitions. Word has length 73 [2024-11-14 05:42:28,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:28,139 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 139 transitions. [2024-11-14 05:42:28,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 13 states have internal predecessors, (35), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-11-14 05:42:28,139 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 139 transitions. [2024-11-14 05:42:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 05:42:28,141 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:28,141 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:28,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:42:28,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 05:42:28,341 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:28,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:28,342 INFO L85 PathProgramCache]: Analyzing trace with hash -186143100, now seen corresponding path program 6 times [2024-11-14 05:42:28,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:28,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626217998] [2024-11-14 05:42:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:28,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:42:28,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445852370] [2024-11-14 05:42:28,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:42:28,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:28,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:28,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:28,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:42:28,495 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:42:28,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:42:28,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-14 05:42:28,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:34,987 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-14 05:42:34,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:42:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 54 proven. 31 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-14 05:42:42,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:42,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626217998] [2024-11-14 05:42:42,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 05:42:42,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445852370] [2024-11-14 05:42:42,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445852370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:42:42,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492687488] [2024-11-14 05:42:42,735 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2024-11-14 05:42:42,735 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:42:42,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:42:42,735 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:42:42,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:42:43,408 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:42:43,417 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:42:43,427 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:42:58,625 WARN L286 SmtUtils]: Spent 12.89s on a formula simplification. DAG size of input: 106 DAG size of output: 102 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:43:07,972 WARN L286 SmtUtils]: Spent 5.82s on a formula simplification. DAG size of input: 109 DAG size of output: 107 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 05:43:15,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6200#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:43:15,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:43:15,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 05:43:15,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 20 [2024-11-14 05:43:15,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72061726] [2024-11-14 05:43:15,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 05:43:15,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 05:43:15,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:43:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 05:43:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1019, Unknown=3, NotChecked=0, Total=1190 [2024-11-14 05:43:15,375 INFO L87 Difference]: Start difference. First operand 116 states and 139 transitions. Second operand has 20 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 13 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-14 05:43:19,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-14 05:43:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:43:20,059 INFO L93 Difference]: Finished difference Result 138 states and 164 transitions. [2024-11-14 05:43:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-14 05:43:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 13 states have call predecessors, (26), 10 states have call successors, (26) Word has length 78 [2024-11-14 05:43:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:43:20,061 INFO L225 Difference]: With dead ends: 138 [2024-11-14 05:43:20,061 INFO L226 Difference]: Without dead ends: 120 [2024-11-14 05:43:20,061 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=208, Invalid=1195, Unknown=3, NotChecked=0, Total=1406 [2024-11-14 05:43:20,062 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:43:20,062 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 309 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 309 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2024-11-14 05:43:20,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-14 05:43:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2024-11-14 05:43:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 75 states have internal predecessors, (77), 31 states have call successors, (31), 16 states have call predecessors, (31), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-14 05:43:20,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2024-11-14 05:43:20,102 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 78 [2024-11-14 05:43:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:43:20,102 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2024-11-14 05:43:20,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 13 states have call predecessors, (26), 10 states have call successors, (26) [2024-11-14 05:43:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2024-11-14 05:43:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 05:43:20,104 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:43:20,104 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:43:20,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 05:43:20,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:43:20,308 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:43:20,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:43:20,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1024952444, now seen corresponding path program 2 times [2024-11-14 05:43:20,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:43:20,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709005091] [2024-11-14 05:43:20,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:43:20,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:43:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:43:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-11-14 05:43:20,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:43:20,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709005091] [2024-11-14 05:43:20,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709005091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:43:20,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251317411] [2024-11-14 05:43:20,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:43:20,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:43:20,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:43:20,634 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:43:20,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:43:21,105 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 05:43:21,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:43:21,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:43:21,111 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:43:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 05:43:21,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:43:21,706 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2024-11-14 05:43:21,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251317411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:43:21,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1821898042] [2024-11-14 05:43:21,708 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-14 05:43:21,708 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:43:21,709 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:43:21,709 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:43:21,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:43:22,409 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2024-11-14 05:43:22,417 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 64 for LOIs [2024-11-14 05:43:22,426 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:43:33,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7153#(and (<= 1 |#StackHeapBarrier|) (<= 1 ~counter~0) (= |__VERIFIER_assert_#in~cond| 0))' at error location [2024-11-14 05:43:33,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:43:33,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:43:33,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 10 [2024-11-14 05:43:33,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494597491] [2024-11-14 05:43:33,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:43:33,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 05:43:33,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:43:33,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 05:43:33,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:43:33,642 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-14 05:43:33,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:43:33,998 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2024-11-14 05:43:33,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 05:43:33,999 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 86 [2024-11-14 05:43:33,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:43:34,000 INFO L225 Difference]: With dead ends: 130 [2024-11-14 05:43:34,000 INFO L226 Difference]: Without dead ends: 122 [2024-11-14 05:43:34,001 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 236 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:43:34,001 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:43:34,002 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 94 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:43:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-14 05:43:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2024-11-14 05:43:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 77 states have internal predecessors, (79), 29 states have call successors, (29), 17 states have call predecessors, (29), 17 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-14 05:43:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 136 transitions. [2024-11-14 05:43:34,047 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 136 transitions. Word has length 86 [2024-11-14 05:43:34,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:43:34,048 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 136 transitions. [2024-11-14 05:43:34,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 7 states have call successors, (31), 7 states have call predecessors, (31), 6 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-14 05:43:34,048 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 136 transitions. [2024-11-14 05:43:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 05:43:34,049 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:43:34,049 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:43:34,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 05:43:34,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:43:34,250 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:43:34,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:43:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1180500140, now seen corresponding path program 3 times [2024-11-14 05:43:34,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:43:34,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732312429] [2024-11-14 05:43:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:43:34,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:43:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 05:43:34,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340419404] [2024-11-14 05:43:34,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:43:34,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:43:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:43:34,332 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:43:34,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:43:34,430 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:43:34,430 INFO L228 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-14 05:43:34,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-14 05:43:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-14 05:43:34,538 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2024-11-14 05:43:34,539 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-14 05:43:34,540 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-14 05:43:34,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 05:43:34,742 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:43:34,744 INFO L407 BasicCegarLoop]: Path program histogram: [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:43:34,795 INFO L173 ceAbstractionStarter]: Computing trace abstraction results [2024-11-14 05:43:34,799 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.11 05:43:34 BoogieIcfgContainer [2024-11-14 05:43:34,800 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-14 05:43:34,800 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-14 05:43:34,800 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-14 05:43:34,800 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-14 05:43:34,801 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:38:43" (3/4) ... [2024-11-14 05:43:34,804 INFO L136 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-14 05:43:34,877 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/witness.graphml [2024-11-14 05:43:34,877 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-14 05:43:34,878 INFO L158 Benchmark]: Toolchain (without parser) took 292157.26ms. Allocated memory was 117.4MB in the beginning and 402.7MB in the end (delta: 285.2MB). Free memory was 91.9MB in the beginning and 287.7MB in the end (delta: -195.8MB). Peak memory consumption was 84.6MB. Max. memory is 16.1GB. [2024-11-14 05:43:34,878 INFO L158 Benchmark]: CDTParser took 1.31ms. Allocated memory is still 83.9MB. Free memory is still 39.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:43:34,881 INFO L158 Benchmark]: CACSL2BoogieTranslator took 357.07ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 80.5MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 05:43:34,881 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.57ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 79.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:43:34,882 INFO L158 Benchmark]: Boogie Preprocessor took 39.38ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 78.7MB in the end (delta: 493.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:43:34,882 INFO L158 Benchmark]: RCFGBuilder took 484.23ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 65.6MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-14 05:43:34,883 INFO L158 Benchmark]: TraceAbstraction took 291144.17ms. Allocated memory was 117.4MB in the beginning and 402.7MB in the end (delta: 285.2MB). Free memory was 65.2MB in the beginning and 291.9MB in the end (delta: -226.7MB). Peak memory consumption was 59.5MB. Max. memory is 16.1GB. [2024-11-14 05:43:34,883 INFO L158 Benchmark]: Witness Printer took 76.89ms. Allocated memory is still 402.7MB. Free memory was 291.9MB in the beginning and 287.7MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-14 05:43:34,885 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.31ms. Allocated memory is still 83.9MB. Free memory is still 39.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 357.07ms. Allocated memory is still 117.4MB. Free memory was 91.9MB in the beginning and 80.5MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.57ms. Allocated memory is still 117.4MB. Free memory was 80.5MB in the beginning and 79.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.38ms. Allocated memory is still 117.4MB. Free memory was 79.2MB in the beginning and 78.7MB in the end (delta: 493.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 484.23ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 65.6MB in the end (delta: 12.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 291144.17ms. Allocated memory was 117.4MB in the beginning and 402.7MB in the end (delta: 285.2MB). Free memory was 65.2MB in the beginning and 291.9MB in the end (delta: -226.7MB). Peak memory consumption was 59.5MB. Max. memory is 16.1GB. * Witness Printer took 76.89ms. Allocated memory is still 402.7MB. Free memory was 291.9MB in the beginning and 287.7MB in the end (delta: 4.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=5, y=17] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=5, y=17] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=5, b=17, counter=0, p=1, q=0, r=0, s=1, x=5, y=17] [L34] EXPR counter++ VAL [a=5, b=17, counter=1, p=1, q=0, r=0, s=1, x=5, y=17] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=17, counter=1, p=1, q=0, r=0, s=1, x=5, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=17, counter=1, p=1, q=0, r=0, s=1, x=5, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=17, counter=1, p=1, q=0, r=0, s=1, x=5, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=12, counter=1, p=1, q=-1, r=0, s=1, x=5, y=17] [L34] EXPR counter++ VAL [a=5, b=12, counter=2, p=1, q=-1, r=0, s=1, x=5, y=17] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=12, counter=2, p=1, q=-1, r=0, s=1, x=5, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=12, counter=2, p=1, q=-1, r=0, s=1, x=5, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=12, counter=2, p=1, q=-1, r=0, s=1, x=5, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=7, counter=2, p=1, q=-2, r=0, s=1, x=5, y=17] [L34] EXPR counter++ VAL [a=5, b=7, counter=3, p=1, q=-2, r=0, s=1, x=5, y=17] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=7, counter=3, p=1, q=-2, r=0, s=1, x=5, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=7, counter=3, p=1, q=-2, r=0, s=1, x=5, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=3] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=3] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=7, counter=3, p=1, q=-2, r=0, s=1, x=5, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND FALSE !(a > b) [L47] b = b - a [L48] q = q - p [L49] s = s - r VAL [a=5, b=2, counter=3, p=1, q=-3, r=0, s=1, x=5, y=17] [L34] EXPR counter++ VAL [a=5, b=2, counter=4, p=1, q=-3, r=0, s=1, x=5, y=17] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=5, b=2, counter=4, p=1, q=-3, r=0, s=1, x=5, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=5, b=2, counter=4, p=1, q=-3, r=0, s=1, x=5, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=4] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=4] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=5, b=2, counter=4, p=1, q=-3, r=0, s=1, x=5, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=2, counter=4, p=4, q=-3, r=-1, s=1, x=5, y=17] [L34] EXPR counter++ VAL [a=3, b=2, counter=5, p=4, q=-3, r=-1, s=1, x=5, y=17] [L34] COND TRUE counter++<5 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=2, counter=5, p=4, q=-3, r=-1, s=1, x=5, y=17] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=2, counter=5, p=4, q=-3, r=-1, s=1, x=5, y=17] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=5] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, counter=5] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=2, counter=5, p=4, q=-3, r=-1, s=1, x=5, y=17] [L39] COND FALSE !(!(a != b)) [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=1, b=2, counter=5, p=7, q=-3, r=-2, s=1, x=5, y=17] [L34] EXPR counter++ VAL [a=1, b=2, counter=6, p=7, q=-3, r=-2, s=1, x=5, y=17] [L34] COND FALSE !(counter++<5) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=6] [L11] COND TRUE !(cond) VAL [\old(cond)=0, counter=6] [L13] reach_error() VAL [\old(cond)=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 291.0s, OverallIterations: 17, TraceHistogramMax: 16, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 18.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 236 SdHoareTripleChecker+Valid, 7.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 180 mSDsluCounter, 2112 SdHoareTripleChecker+Invalid, 7.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1687 mSDsCounter, 210 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1457 IncrementalHoareTripleChecker+Invalid, 1668 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 210 mSolverCounterUnsat, 425 mSDtfsCounter, 1457 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1526 GetRequests, 1249 SyntacticMatches, 12 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 238.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=16, InterpolantAutomatonStates: 122, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 43 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 34.6s InterpolantComputationTime, 1415 NumberOfCodeBlocks, 1378 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1261 ConstructedInterpolants, 0 QuantifiedInterpolants, 16720 SizeOfPredicates, 38 NumberOfNonLiveVariables, 1467 ConjunctsInSsa, 200 ConjunctsInUnsatCore, 28 InterpolantComputations, 8 PerfectInterpolantSequences, 2356/2897 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-11-14 05:43:35,103 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2024-11-14 05:43:35,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5a4abe1-96a8-4670-aa7f-06cadbac5909/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE