./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:31:36,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:31:37,009 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-06 20:31:37,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:31:37,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:31:37,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:31:37,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:31:37,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:31:37,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:31:37,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:31:37,070 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:31:37,072 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:31:37,072 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:31:37,074 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:31:37,075 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:31:37,076 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:31:37,077 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:31:37,077 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:31:37,077 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:31:37,078 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:31:37,078 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:31:37,079 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:31:37,080 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:31:37,081 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 20:31:37,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:31:37,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:31:37,082 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:31:37,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:31:37,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 20:31:37,084 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:31:37,085 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 20:31:37,086 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:31:37,086 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 20:31:37,086 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:31:37,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:31:37,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:31:37,087 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:37,087 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:31:37,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:31:37,088 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 20:31:37,088 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:31:37,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:31:37,089 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 20:31:37,089 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:31:37,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:31:37,090 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c [2023-11-06 20:31:37,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:31:37,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:31:37,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:31:37,425 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:31:37,426 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:31:37,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2023-11-06 20:31:40,674 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:31:40,967 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:31:40,967 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2023-11-06 20:31:40,976 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/data/feacb17ac/7289c68222bb4e668ac6c91473d60396/FLAG51fbdc453 [2023-11-06 20:31:40,994 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/data/feacb17ac/7289c68222bb4e668ac6c91473d60396 [2023-11-06 20:31:41,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:31:41,005 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:31:41,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:41,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:31:41,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:31:41,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:41,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ff5676b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41, skipping insertion in model container [2023-11-06 20:31:41,016 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:31:40" (1/1) ... [2023-11-06 20:31:41,043 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:31:41,219 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2023-11-06 20:31:41,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:41,256 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:31:41,274 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2023-11-06 20:31:41,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:31:41,314 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:31:41,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41 WrapperNode [2023-11-06 20:31:41,315 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:31:41,316 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:41,316 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:31:41,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:31:41,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,333 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,353 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-11-06 20:31:41,354 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:31:41,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:31:41,355 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:31:41,355 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:31:41,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,366 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,366 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,372 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:31:41,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:31:41,382 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:31:41,382 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:31:41,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (1/1) ... [2023-11-06 20:31:41,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:31:41,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:41,423 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:31:41,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:31:41,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:31:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:31:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:31:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:31:41,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:31:41,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:31:41,476 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:31:41,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:31:41,569 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:31:41,571 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:31:41,835 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:31:41,888 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:31:41,889 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-06 20:31:41,893 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:41 BoogieIcfgContainer [2023-11-06 20:31:41,893 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:31:41,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:31:41,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:31:41,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:31:41,902 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:31:40" (1/3) ... [2023-11-06 20:31:41,904 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1d4bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:41, skipping insertion in model container [2023-11-06 20:31:41,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:31:41" (2/3) ... [2023-11-06 20:31:41,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e1d4bf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:31:41, skipping insertion in model container [2023-11-06 20:31:41,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:31:41" (3/3) ... [2023-11-06 20:31:41,909 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2023-11-06 20:31:41,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:31:41,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 20:31:41,998 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:31:42,007 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@7f9c17d1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:31:42,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 20:31:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 20:31:42,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:42,020 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:42,021 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:42,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -506070354, now seen corresponding path program 1 times [2023-11-06 20:31:42,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:42,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732927909] [2023-11-06 20:31:42,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:42,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:42,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732927909] [2023-11-06 20:31:42,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732927909] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:42,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:31:42,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:31:42,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971657139] [2023-11-06 20:31:42,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:42,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:31:42,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:42,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:31:42,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:31:42,344 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:42,392 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2023-11-06 20:31:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:31:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-06 20:31:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:42,404 INFO L225 Difference]: With dead ends: 19 [2023-11-06 20:31:42,404 INFO L226 Difference]: Without dead ends: 10 [2023-11-06 20:31:42,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:31:42,412 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:42,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:31:42,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-06 20:31:42,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-06 20:31:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2023-11-06 20:31:42,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 7 [2023-11-06 20:31:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:42,449 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2023-11-06 20:31:42,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2023-11-06 20:31:42,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-06 20:31:42,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:42,451 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:42,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:31:42,451 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:42,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash -483965599, now seen corresponding path program 1 times [2023-11-06 20:31:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:42,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663967744] [2023-11-06 20:31:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:31:42,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:42,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663967744] [2023-11-06 20:31:42,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663967744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:42,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403459621] [2023-11-06 20:31:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:42,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:42,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:42,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:42,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:31:42,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:42,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 20:31:42,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:31:42,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:31:42,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403459621] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:31:42,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:31:42,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-06 20:31:42,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516760581] [2023-11-06 20:31:42,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:31:42,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:31:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:42,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:31:42,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:42,794 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:42,837 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-11-06 20:31:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:31:42,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-06 20:31:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:42,840 INFO L225 Difference]: With dead ends: 18 [2023-11-06 20:31:42,840 INFO L226 Difference]: Without dead ends: 12 [2023-11-06 20:31:42,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:31:42,843 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:42,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:31:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-06 20:31:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-06 20:31:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2023-11-06 20:31:42,854 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2023-11-06 20:31:42,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:42,854 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2023-11-06 20:31:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2023-11-06 20:31:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:31:42,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:42,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:42,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:43,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:43,063 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:43,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1853715406, now seen corresponding path program 1 times [2023-11-06 20:31:43,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:43,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777299846] [2023-11-06 20:31:43,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:43,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:31:43,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:43,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777299846] [2023-11-06 20:31:43,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777299846] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:43,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240557865] [2023-11-06 20:31:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:43,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:43,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:43,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:31:43,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:43,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:31:43,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:31:43,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:43,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:31:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240557865] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:43,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1303904703] [2023-11-06 20:31:43,375 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:31:43,375 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:43,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:43,384 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:43,385 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:44,206 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:44,540 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '191#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:31:44,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:44,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-06 20:31:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697643202] [2023-11-06 20:31:44,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:44,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:31:44,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:31:44,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:31:44,546 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:44,608 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2023-11-06 20:31:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:31:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 20:31:44,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:44,610 INFO L225 Difference]: With dead ends: 24 [2023-11-06 20:31:44,610 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 20:31:44,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:31:44,615 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:44,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:31:44,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 20:31:44,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-06 20:31:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-11-06 20:31:44,624 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-11-06 20:31:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:44,624 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-11-06 20:31:44,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-11-06 20:31:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:31:44,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:44,626 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:44,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:44,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:44,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:44,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1884843675, now seen corresponding path program 2 times [2023-11-06 20:31:44,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:44,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907347374] [2023-11-06 20:31:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:44,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 20:31:45,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:45,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907347374] [2023-11-06 20:31:45,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907347374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:45,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391448924] [2023-11-06 20:31:45,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:31:45,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:45,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:45,024 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:45,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:31:45,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:31:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:31:45,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:31:45,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:45,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 20:31:45,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 20:31:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391448924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1219633387] [2023-11-06 20:31:45,166 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:31:45,166 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:45,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:45,167 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:45,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:45,595 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:45,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '339#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:31:45,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:45,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:45,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 20:31:45,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402549124] [2023-11-06 20:31:45,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:45,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:31:45,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:31:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:31:45,891 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:45,943 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2023-11-06 20:31:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:31:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 20:31:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:45,945 INFO L225 Difference]: With dead ends: 28 [2023-11-06 20:31:45,945 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 20:31:45,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:31:45,946 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:45,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:31:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 20:31:45,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 20:31:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-06 20:31:45,951 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-11-06 20:31:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:45,952 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-06 20:31:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-06 20:31:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-06 20:31:45,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:45,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:45,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:46,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:46,161 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:46,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:46,162 INFO L85 PathProgramCache]: Analyzing trace with hash -917701586, now seen corresponding path program 3 times [2023-11-06 20:31:46,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:46,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624992879] [2023-11-06 20:31:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:46,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:46,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624992879] [2023-11-06 20:31:46,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624992879] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:46,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191969282] [2023-11-06 20:31:46,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:31:46,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:46,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:46,402 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:46,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:31:46,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:31:46,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:31:46,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:31:46,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:46,524 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:46,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:46,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191969282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:46,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246570351] [2023-11-06 20:31:46,604 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:31:46,604 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:46,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:46,605 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:46,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:46,957 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:47,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '549#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:31:47,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:47,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:47,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 20:31:47,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341029850] [2023-11-06 20:31:47,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:47,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:31:47,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:47,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:31:47,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:31:47,291 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:47,338 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-11-06 20:31:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:31:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-06 20:31:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:47,340 INFO L225 Difference]: With dead ends: 42 [2023-11-06 20:31:47,340 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 20:31:47,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:31:47,342 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:47,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:31:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 20:31:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-06 20:31:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-06 20:31:47,352 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2023-11-06 20:31:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:47,352 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-06 20:31:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-06 20:31:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-06 20:31:47,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:47,355 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:47,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:47,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:47,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:47,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:47,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1843722418, now seen corresponding path program 4 times [2023-11-06 20:31:47,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:47,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049832514] [2023-11-06 20:31:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:47,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:47,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049832514] [2023-11-06 20:31:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049832514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394658178] [2023-11-06 20:31:47,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 20:31:47,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:47,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:47,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 20:31:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:48,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 20:31:48,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:48,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:48,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394658178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:48,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352195699] [2023-11-06 20:31:48,376 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:31:48,376 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:48,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:48,377 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:48,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:48,689 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:49,088 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '847#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:31:49,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:49,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:49,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-06 20:31:49,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207269522] [2023-11-06 20:31:49,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:49,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 20:31:49,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:49,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 20:31:49,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-06 20:31:49,091 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:49,161 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2023-11-06 20:31:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 20:31:49,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-06 20:31:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:49,162 INFO L225 Difference]: With dead ends: 54 [2023-11-06 20:31:49,162 INFO L226 Difference]: Without dead ends: 39 [2023-11-06 20:31:49,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2023-11-06 20:31:49,164 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:49,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:31:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-06 20:31:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-06 20:31:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-06 20:31:49,172 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2023-11-06 20:31:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:49,172 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-06 20:31:49,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:49,173 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-06 20:31:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-06 20:31:49,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:49,174 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:49,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:49,381 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:49,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -13462130, now seen corresponding path program 5 times [2023-11-06 20:31:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:49,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246637359] [2023-11-06 20:31:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:49,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-06 20:31:50,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:50,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246637359] [2023-11-06 20:31:50,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246637359] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:50,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643819543] [2023-11-06 20:31:50,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:31:50,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:50,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:50,300 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:50,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 20:31:50,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-06 20:31:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:31:50,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:31:50,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-06 20:31:50,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2023-11-06 20:31:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643819543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1465470873] [2023-11-06 20:31:50,690 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:31:50,690 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:50,690 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:50,691 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:50,691 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:50,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:51,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1275#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:31:51,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:51,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:51,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2023-11-06 20:31:51,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241329761] [2023-11-06 20:31:51,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:51,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-06 20:31:51,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-06 20:31:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 20:31:51,589 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:51,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:51,737 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2023-11-06 20:31:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 20:31:51,737 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-11-06 20:31:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:51,738 INFO L225 Difference]: With dead ends: 67 [2023-11-06 20:31:51,739 INFO L226 Difference]: Without dead ends: 52 [2023-11-06 20:31:51,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2023-11-06 20:31:51,741 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:51,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:31:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-06 20:31:51,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-06 20:31:51,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:51,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2023-11-06 20:31:51,750 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 37 [2023-11-06 20:31:51,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:51,751 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2023-11-06 20:31:51,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:51,751 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2023-11-06 20:31:51,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 20:31:51,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:51,753 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:51,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:51,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 20:31:51,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:51,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2042738783, now seen corresponding path program 6 times [2023-11-06 20:31:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282612454] [2023-11-06 20:31:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:52,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-06 20:31:53,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:53,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282612454] [2023-11-06 20:31:53,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282612454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:53,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281778978] [2023-11-06 20:31:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 20:31:53,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:53,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:53,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:53,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 20:31:53,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 20:31:53,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:31:53,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-06 20:31:53,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-06 20:31:53,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:31:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-06 20:31:54,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281778978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:31:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571351776] [2023-11-06 20:31:54,416 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:31:54,416 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:31:54,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:31:54,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:31:54,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:31:54,750 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:31:55,523 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1849#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:31:55,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:31:55,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:31:55,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2023-11-06 20:31:55,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140547188] [2023-11-06 20:31:55,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:31:55,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-06 20:31:55,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:31:55,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-06 20:31:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 20:31:55,537 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:31:55,681 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2023-11-06 20:31:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-06 20:31:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2023-11-06 20:31:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:31:55,683 INFO L225 Difference]: With dead ends: 104 [2023-11-06 20:31:55,683 INFO L226 Difference]: Without dead ends: 77 [2023-11-06 20:31:55,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 108 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 20:31:55,686 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:31:55,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:31:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-06 20:31:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-11-06 20:31:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2023-11-06 20:31:55,696 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 50 [2023-11-06 20:31:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:31:55,697 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2023-11-06 20:31:55,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:31:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2023-11-06 20:31:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 20:31:55,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:31:55,699 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:31:55,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 20:31:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:55,907 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:31:55,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:31:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2060351602, now seen corresponding path program 7 times [2023-11-06 20:31:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:31:55,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981728604] [2023-11-06 20:31:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:31:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:31:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-06 20:31:58,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:31:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981728604] [2023-11-06 20:31:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981728604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:31:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510380613] [2023-11-06 20:31:58,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 20:31:58,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:31:58,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:31:58,969 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:31:58,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 20:31:59,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:31:59,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-06 20:31:59,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:31:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-06 20:31:59,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1286 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-11-06 20:32:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510380613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145075929] [2023-11-06 20:32:02,758 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 20:32:02,758 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:02,758 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:02,759 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:02,759 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:03,061 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:04,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2747#(and (<= 1 |#StackHeapBarrier|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_#t~mem9#1| |ULTIMATE.start_main_#t~mem10#1|)) (<= 2 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 2 |ULTIMATE.start_main_~#a3~0#1.base|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) 0) |ULTIMATE.start_main_#t~mem10#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 2 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) 0) |ULTIMATE.start_main_#t~mem9#1|) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:32:04,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:04,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:04,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-06 20:32:04,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37290319] [2023-11-06 20:32:04,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:04,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-06 20:32:04,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-06 20:32:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 20:32:04,114 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:04,354 INFO L93 Difference]: Finished difference Result 154 states and 209 transitions. [2023-11-06 20:32:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-06 20:32:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-06 20:32:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:04,356 INFO L225 Difference]: With dead ends: 154 [2023-11-06 20:32:04,356 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 20:32:04,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2023-11-06 20:32:04,361 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:04,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 20:32:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-06 20:32:04,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:04,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2023-11-06 20:32:04,382 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 75 [2023-11-06 20:32:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:04,383 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2023-11-06 20:32:04,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2023-11-06 20:32:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-06 20:32:04,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:04,388 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:32:04,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 20:32:04,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_254f833d-3caa-4952-a3ee-9d54afd66ed8/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:04,596 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 20:32:04,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash -543873298, now seen corresponding path program 8 times [2023-11-06 20:32:04,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:04,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899606159] [2023-11-06 20:32:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:04,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat