./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d1f3c30f17cc68a40d1b0b31634de48071c9ae3c0808bd553c6c6ce86d938069 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:32:24,272 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:32:24,352 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 16:32:24,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:32:24,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:32:24,379 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:32:24,380 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:32:24,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:32:24,381 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:32:24,381 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:32:24,382 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:32:24,382 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:32:24,383 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:32:24,383 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:32:24,384 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:32:24,384 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:32:24,385 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:32:24,385 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:32:24,386 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:32:24,386 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:32:24,387 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:32:24,388 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:32:24,389 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:32:24,389 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 16:32:24,389 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:32:24,390 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:32:24,390 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 16:32:24,391 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:32:24,391 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 16:32:24,391 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 16:32:24,392 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:32:24,392 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:32:24,393 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:32:24,393 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:32:24,393 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:32:24,393 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:32:24,393 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:32:24,394 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 16:32:24,394 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:32:24,394 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:32:24,394 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:32:24,395 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 16:32:24,395 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:32:24,395 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:32:24,395 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_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1f3c30f17cc68a40d1b0b31634de48071c9ae3c0808bd553c6c6ce86d938069 [2023-12-02 16:32:24,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:32:24,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:32:24,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:32:24,624 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:32:24,625 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:32:24,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2023-12-02 16:32:27,332 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:32:29,632 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:32:29,633 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c [2023-12-02 16:32:29,641 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/data/5f837ef54/9066560cb7d34567b73dd9ebc8640454/FLAGce2a4d151 [2023-12-02 16:32:29,656 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/data/5f837ef54/9066560cb7d34567b73dd9ebc8640454 [2023-12-02 16:32:29,659 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:32:29,660 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:32:29,661 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:32:29,662 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:32:29,667 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:32:29,668 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,669 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eed11bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29, skipping insertion in model container [2023-12-02 16:32:29,669 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,689 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:32:29,810 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_1ad71390-7c54-40e3-acf8-c764af5c7e96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c[1258,1271] [2023-12-02 16:32:29,836 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:32:29,849 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:32:29,859 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_1ad71390-7c54-40e3-acf8-c764af5c7e96/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.recount4.c[1258,1271] [2023-12-02 16:32:29,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:32:29,884 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:32:29,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29 WrapperNode [2023-12-02 16:32:29,885 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:32:29,886 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:32:29,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:32:29,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:32:29,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,932 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2023-12-02 16:32:29,932 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:32:29,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:32:29,933 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:32:29,933 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:32:29,942 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,955 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,958 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,963 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:32:29,964 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:32:29,964 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:32:29,964 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:32:29,965 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (1/1) ... [2023-12-02 16:32:29,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:32:29,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:29,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:32:30,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:32:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:32:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:32:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:32:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:32:30,117 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:32:30,119 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:32:30,325 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:32:30,461 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:32:30,461 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 16:32:30,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:30 BoogieIcfgContainer [2023-12-02 16:32:30,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:32:30,466 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:32:30,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:32:30,469 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:32:30,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:32:29" (1/3) ... [2023-12-02 16:32:30,470 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234cf574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:32:30, skipping insertion in model container [2023-12-02 16:32:30,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:29" (2/3) ... [2023-12-02 16:32:30,471 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234cf574 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:32:30, skipping insertion in model container [2023-12-02 16:32:30,471 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:30" (3/3) ... [2023-12-02 16:32:30,472 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.recount4.c [2023-12-02 16:32:30,489 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:32:30,489 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 16:32:30,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:32:30,530 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1114114f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:32:30,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 16:32:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2023-12-02 16:32:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 16:32:30,539 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:30,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 16:32:30,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:30,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:30,544 INFO L85 PathProgramCache]: Analyzing trace with hash 4023355, now seen corresponding path program 1 times [2023-12-02 16:32:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:30,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582263641] [2023-12-02 16:32:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:31,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:31,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:31,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582263641] [2023-12-02 16:32:31,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582263641] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:31,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:31,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:31,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295112965] [2023-12-02 16:32:31,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:31,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:32:31,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:31,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:32:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:31,083 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-12-02 16:32:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:31,168 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2023-12-02 16:32:31,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:32:31,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2023-12-02 16:32:31,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:31,178 INFO L225 Difference]: With dead ends: 15 [2023-12-02 16:32:31,179 INFO L226 Difference]: Without dead ends: 9 [2023-12-02 16:32:31,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:32:31,185 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:31,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 6 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:31,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-02 16:32:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2023-12-02 16:32:31,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2023-12-02 16:32:31,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-12-02 16:32:31,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2023-12-02 16:32:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:31,217 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-12-02 16:32:31,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2023-12-02 16:32:31,218 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-12-02 16:32:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:32:31,218 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:31,218 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 16:32:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:32:31,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash -393206758, now seen corresponding path program 1 times [2023-12-02 16:32:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340218624] [2023-12-02 16:32:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:31,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:32,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340218624] [2023-12-02 16:32:32,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340218624] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:32,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173633561] [2023-12-02 16:32:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:32,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:32,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:32,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:32,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:32:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:32,413 WARN L260 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 16:32:32,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:32,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:34,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173633561] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [289785514] [2023-12-02 16:32:34,667 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 16:32:34,668 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:34,671 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:34,677 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:34,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:36,922 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:37,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '92#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~var_8~0#1| 1) (= 15 |ULTIMATE.start_main_~var_14_arg_1~0#1|) (= |ULTIMATE.start_main_~var_14~0#1| 1) (= |ULTIMATE.start_main_~state_6~0#1| |ULTIMATE.start_main_~var_14_arg_0~0#1|) (= |ULTIMATE.start_main_~msb_SORT_4~0#1| 8) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~var_5~0#1| 0) (= |ULTIMATE.start_main_~var_13~0#1| 15) (<= 0 |ULTIMATE.start_main_~state_6~0#1|) (or (and (= |ULTIMATE.start_main_~input_2~0#1| 0) (exists ((|v_ULTIMATE.start_main_~input_2~0#1_26| Int)) (= 0 (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256)))) (exists ((|v_ULTIMATE.start_main_#t~nondet7#1_44| Int) (|v_ULTIMATE.start_main_~input_2~0#1_26| Int)) (and (or (and (<= |v_ULTIMATE.start_main_#t~nondet7#1_44| 1) (not (= (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256) 1)) (= |ULTIMATE.start_main_~input_2~0#1| |v_ULTIMATE.start_main_#t~nondet7#1_44|) (<= 0 |v_ULTIMATE.start_main_#t~nondet7#1_44|)) (and (= |ULTIMATE.start_main_~input_2~0#1| 1) (= (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256) 1))) (not (= 0 (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256)))))) (or (exists ((|v_ULTIMATE.start_main_#t~nondet9#1_40| Int) (|v_ULTIMATE.start_main_~input_3~0#1_26| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 0)) (or (and (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 1) (= |ULTIMATE.start_main_~input_3~0#1| 1)) (and (<= 0 |v_ULTIMATE.start_main_#t~nondet9#1_40|) (<= |v_ULTIMATE.start_main_#t~nondet9#1_40| 1) (not (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 1)) (= |ULTIMATE.start_main_~input_3~0#1| |v_ULTIMATE.start_main_#t~nondet9#1_40|))))) (and (= |ULTIMATE.start_main_~input_3~0#1| 0) (exists ((|v_ULTIMATE.start_main_~input_3~0#1_26| Int)) (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 0)))) (= |ULTIMATE.start_main_~init_7_arg_1~0#1| 0) (= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1) (= 15 (mod |ULTIMATE.start_main_~var_14_arg_0~0#1| 256)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~mask_SORT_4~0#1| 15) (= |ULTIMATE.start_main_~bad_15_arg_0~0#1| 1) (= |ULTIMATE.start_main_~msb_SORT_1~0#1| 1))' at error location [2023-12-02 16:32:37,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:37,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:37,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 11 [2023-12-02 16:32:37,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869341336] [2023-12-02 16:32:37,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:37,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 16:32:37,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:37,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 16:32:37,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:32:37,814 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2023-12-02 16:32:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:38,310 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-12-02 16:32:38,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 16:32:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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 [2023-12-02 16:32:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:38,311 INFO L225 Difference]: With dead ends: 17 [2023-12-02 16:32:38,311 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 16:32:38,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:32:38,312 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:38,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:32:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 16:32:38,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-12-02 16:32:38,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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) [2023-12-02 16:32:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-12-02 16:32:38,318 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2023-12-02 16:32:38,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:38,318 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-12-02 16:32:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 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) [2023-12-02 16:32:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-12-02 16:32:38,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 16:32:38,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:38,319 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1] [2023-12-02 16:32:38,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:32:38,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:38,520 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:32:38,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:38,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1540063354, now seen corresponding path program 2 times [2023-12-02 16:32:38,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:38,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102727076] [2023-12-02 16:32:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:38,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:21,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:33:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102727076] [2023-12-02 16:33:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102727076] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:33:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176700037] [2023-12-02 16:33:21,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:33:21,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:21,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:21,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:21,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:33:22,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 16:33:22,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:33:22,262 WARN L260 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-02 16:33:22,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:23,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:58,445 WARN L293 SmtUtils]: Spent 13.07s on a formula simplification. DAG size of input: 242 DAG size of output: 155 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:34:25,027 WARN L293 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 156 DAG size of output: 147 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:35:13,614 WARN L293 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 72 DAG size of output: 31 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) [2023-12-02 16:36:50,499 WARN L293 SmtUtils]: Spent 43.68s on a formula simplification. DAG size of input: 311 DAG size of output: 204 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:37:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:37:23,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176700037] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:37:23,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495494296] [2023-12-02 16:37:23,122 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2023-12-02 16:37:23,122 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:37:23,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:37:23,122 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:37:23,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:37:24,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:37:25,308 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '236#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~var_8~0#1| 1) (= 15 |ULTIMATE.start_main_~var_14_arg_1~0#1|) (= |ULTIMATE.start_main_~var_14~0#1| 1) (or (and (= |ULTIMATE.start_main_~input_2~0#1| 0) (exists ((|v_ULTIMATE.start_main_~input_2~0#1_26| Int)) (= 0 (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256)))) (exists ((|v_ULTIMATE.start_main_#t~nondet7#1_48| Int) (|v_ULTIMATE.start_main_~input_2~0#1_26| Int)) (and (not (= 0 (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256))) (or (and (= |ULTIMATE.start_main_~input_2~0#1| 1) (= (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256) 1)) (and (<= |v_ULTIMATE.start_main_#t~nondet7#1_48| 1) (= |ULTIMATE.start_main_~input_2~0#1| |v_ULTIMATE.start_main_#t~nondet7#1_48|) (<= 0 |v_ULTIMATE.start_main_#t~nondet7#1_48|) (not (= (mod |v_ULTIMATE.start_main_~input_2~0#1_26| 256) 1))))))) (= |ULTIMATE.start_main_~state_6~0#1| |ULTIMATE.start_main_~var_14_arg_0~0#1|) (= |ULTIMATE.start_main_~msb_SORT_4~0#1| 8) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~var_5~0#1| 0) (= |ULTIMATE.start_main_~var_13~0#1| 15) (<= 0 |ULTIMATE.start_main_~state_6~0#1|) (= |ULTIMATE.start_main_~init_7_arg_1~0#1| 0) (= |ULTIMATE.start_main_~mask_SORT_1~0#1| 1) (or (and (= |ULTIMATE.start_main_~input_3~0#1| 0) (exists ((|v_ULTIMATE.start_main_~input_3~0#1_26| Int)) (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 0))) (exists ((|v_ULTIMATE.start_main_#t~nondet9#1_43| Int) (|v_ULTIMATE.start_main_~input_3~0#1_26| Int)) (and (or (and (<= 0 |v_ULTIMATE.start_main_#t~nondet9#1_43|) (= |ULTIMATE.start_main_~input_3~0#1| |v_ULTIMATE.start_main_#t~nondet9#1_43|) (not (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 1)) (<= |v_ULTIMATE.start_main_#t~nondet9#1_43| 1)) (and (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 1) (= |ULTIMATE.start_main_~input_3~0#1| 1))) (not (= (mod |v_ULTIMATE.start_main_~input_3~0#1_26| 256) 0))))) (= 15 (mod |ULTIMATE.start_main_~var_14_arg_0~0#1| 256)) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_main_~mask_SORT_4~0#1| 15) (= |ULTIMATE.start_main_~bad_15_arg_0~0#1| 1) (= |ULTIMATE.start_main_~msb_SORT_1~0#1| 1))' at error location [2023-12-02 16:37:25,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:37:25,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:37:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 10] total 22 [2023-12-02 16:37:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502272110] [2023-12-02 16:37:25,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:37:25,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 16:37:25,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:37:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 16:37:25,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=518, Unknown=3, NotChecked=0, Total=702 [2023-12-02 16:37:25,311 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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) [2023-12-02 16:37:57,590 WARN L293 SmtUtils]: Spent 31.80s on a formula simplification. DAG size of input: 303 DAG size of output: 130 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:38:22,084 WARN L293 SmtUtils]: Spent 22.27s on a formula simplification. DAG size of input: 305 DAG size of output: 132 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:38:25,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 16:38:27,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 16:38:40,294 WARN L293 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 162 DAG size of output: 116 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:39:00,863 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification. DAG size of input: 185 DAG size of output: 130 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:39:03,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 16:39:05,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-12-02 16:39:25,843 WARN L293 SmtUtils]: Spent 15.82s on a formula simplification. DAG size of input: 184 DAG size of output: 146 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:39:25,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:39:25,848 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-12-02 16:39:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 16:39:25,849 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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 [2023-12-02 16:39:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:39:25,850 INFO L225 Difference]: With dead ends: 29 [2023-12-02 16:39:25,850 INFO L226 Difference]: Without dead ends: 27 [2023-12-02 16:39:25,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 188.5s TimeCoverageRelationStatistics Valid=441, Invalid=1113, Unknown=6, NotChecked=0, Total=1560 [2023-12-02 16:39:25,852 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:39:25,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 16 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 4 Unknown, 0 Unchecked, 11.3s Time] [2023-12-02 16:39:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-02 16:39:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-12-02 16:39:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 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) [2023-12-02 16:39:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-12-02 16:39:25,863 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 13 [2023-12-02 16:39:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:39:25,863 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-12-02 16:39:25,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 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) [2023-12-02 16:39:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-12-02 16:39:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:39:25,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:39:25,864 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1] [2023-12-02 16:39:25,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:39:26,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ad71390-7c54-40e3-acf8-c764af5c7e96/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:39:26,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 16:39:26,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:39:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash -996417222, now seen corresponding path program 3 times [2023-12-02 16:39:26,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:39:26,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315628331] [2023-12-02 16:39:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:39:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:39:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat