./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/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_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/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 32bit --witnessprinter.graph.data.programhash b9188b0bb7d345bde8858a6e4085c80a345a783efac7d50b39494fde4a7e156f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:12:28,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:12:28,107 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 19:12:28,112 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:12:28,112 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:12:28,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:12:28,139 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:12:28,140 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:12:28,141 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:12:28,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:12:28,142 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:12:28,143 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:12:28,143 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:12:28,144 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:12:28,144 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:12:28,145 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:12:28,145 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:12:28,146 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:12:28,146 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:12:28,147 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:12:28,147 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:12:28,152 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:12:28,153 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:12:28,154 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:12:28,154 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:12:28,154 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:12:28,155 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:12:28,155 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:12:28,155 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:12:28,156 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:12:28,156 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:12:28,157 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:12:28,157 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:12:28,157 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:12:28,157 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:12:28,158 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:12:28,158 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:12:28,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:12:28,158 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:12:28,159 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:12:28,159 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:12:28,159 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:12:28,159 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:12:28,160 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:12:28,160 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:12:28,160 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:12:28,160 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:12:28,161 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_b712406a-d83f-4581-ba66-5d02331b5f0c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b9188b0bb7d345bde8858a6e4085c80a345a783efac7d50b39494fde4a7e156f [2023-12-02 19:12:28,386 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:12:28,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:12:28,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:12:28,411 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:12:28,411 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:12:28,412 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/eca-rers2012/Problem14_label51.c [2023-12-02 19:12:31,192 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:12:31,496 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:12:31,496 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/sv-benchmarks/c/eca-rers2012/Problem14_label51.c [2023-12-02 19:12:31,511 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/data/93212fa2a/786a3f335f7749ccaf442ce167c7eb59/FLAGc850ae6b5 [2023-12-02 19:12:31,527 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/data/93212fa2a/786a3f335f7749ccaf442ce167c7eb59 [2023-12-02 19:12:31,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:12:31,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:12:31,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:12:31,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:12:31,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:12:31,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:12:31" (1/1) ... [2023-12-02 19:12:31,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e72e47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:31, skipping insertion in model container [2023-12-02 19:12:31,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:12:31" (1/1) ... [2023-12-02 19:12:31,589 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:12:31,774 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_b712406a-d83f-4581-ba66-5d02331b5f0c/sv-benchmarks/c/eca-rers2012/Problem14_label51.c[3722,3735] [2023-12-02 19:12:31,946 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:12:31,958 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:12:31,981 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_b712406a-d83f-4581-ba66-5d02331b5f0c/sv-benchmarks/c/eca-rers2012/Problem14_label51.c[3722,3735] [2023-12-02 19:12:32,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:12:32,105 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:12:32,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32 WrapperNode [2023-12-02 19:12:32,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:12:32,107 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:12:32,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:12:32,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:12:32,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,238 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 859 [2023-12-02 19:12:32,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:12:32,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:12:32,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:12:32,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:12:32,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,291 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,301 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,324 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:12:32,325 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:12:32,325 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:12:32,325 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:12:32,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (1/1) ... [2023-12-02 19:12:32,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:12:32,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:12:32,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:12:32,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:12:32,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:12:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:12:32,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:12:32,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:12:32,454 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:12:32,455 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:12:33,598 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:12:37,579 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:12:37,580 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:12:37,581 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:12:37 BoogieIcfgContainer [2023-12-02 19:12:37,581 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:12:37,583 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:12:37,583 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:12:37,586 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:12:37,586 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:12:31" (1/3) ... [2023-12-02 19:12:37,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19587737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:12:37, skipping insertion in model container [2023-12-02 19:12:37,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:12:32" (2/3) ... [2023-12-02 19:12:37,587 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19587737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:12:37, skipping insertion in model container [2023-12-02 19:12:37,587 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:12:37" (3/3) ... [2023-12-02 19:12:37,589 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label51.c [2023-12-02 19:12:37,605 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:12:37,606 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 19:12:37,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:12:37,651 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;@f87d3d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:12:37,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 19:12:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 19:12:37,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:12:37,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:12:37,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:12:37,661 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:12:37,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:12:37,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1057257950, now seen corresponding path program 1 times [2023-12-02 19:12:37,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:12:37,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014841941] [2023-12-02 19:12:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:12:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:12:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:12:37,853 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 19:12:37,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:12:37,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014841941] [2023-12-02 19:12:37,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014841941] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:12:37,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:12:37,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:12:37,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682165131] [2023-12-02 19:12:37,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:12:37,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:12:37,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:12:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:12:37,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:12:37,887 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 19:12:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:12:37,984 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2023-12-02 19:12:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:12:37,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2023-12-02 19:12:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:12:37,997 INFO L225 Difference]: With dead ends: 23 [2023-12-02 19:12:37,997 INFO L226 Difference]: Without dead ends: 11 [2023-12-02 19:12:38,001 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 [2023-12-02 19:12:38,007 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:12:38,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 7 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:12:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-12-02 19:12:38,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2023-12-02 19:12:38,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 19:12:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-12-02 19:12:38,040 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2023-12-02 19:12:38,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:12:38,040 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-12-02 19:12:38,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 19:12:38,041 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-12-02 19:12:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 19:12:38,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:12:38,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-12-02 19:12:38,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:12:38,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:12:38,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:12:38,043 INFO L85 PathProgramCache]: Analyzing trace with hash 524023736, now seen corresponding path program 1 times [2023-12-02 19:12:38,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:12:38,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632620606] [2023-12-02 19:12:38,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:12:38,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:12:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:00,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:13:00,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632620606] [2023-12-02 19:13:00,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632620606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:13:00,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499011196] [2023-12-02 19:13:00,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:13:00,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:13:00,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:13:00,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:13:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:13:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:13:00,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:13:00,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:13:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:03,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:13:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:13:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499011196] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:13:08,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1141555540] [2023-12-02 19:13:08,185 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-12-02 19:13:08,185 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:13:08,189 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:13:08,194 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:13:08,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:13:09,498 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2023-12-02 19:13:10,130 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 17568 conjunctions. This might take some time... [2023-12-02 19:13:11,821 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 612 conjunctions. [2023-12-02 19:13:11,847 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 31 [2023-12-02 19:13:12,279 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 17568 conjunctions. This might take some time... [2023-12-02 19:13:13,919 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 612 conjunctions. [2023-12-02 19:17:44,260 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-12-02 19:17:44,456 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8652 conjunctions. This might take some time... [2023-12-02 19:17:44,782 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjunctions. [2023-12-02 19:17:44,787 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-12-02 19:17:44,948 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8652 conjunctions. This might take some time... [2023-12-02 19:17:45,231 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjunctions. [2023-12-02 19:23:39,192 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-12-02 19:23:39,351 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8652 conjunctions. This might take some time... [2023-12-02 19:23:39,633 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjunctions. [2023-12-02 19:23:39,636 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-12-02 19:23:39,793 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8652 conjunctions. This might take some time... [2023-12-02 19:23:40,077 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjunctions. [2023-12-02 19:23:40,447 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-12-02 19:23:40,614 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8652 conjunctions. This might take some time... [2023-12-02 19:23:40,897 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjunctions. [2023-12-02 19:23:41,687 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 30 [2023-12-02 19:23:41,852 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8652 conjunctions. This might take some time... [2023-12-02 19:23:42,138 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 306 conjunctions. [2023-12-02 19:23:42,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:23:43,290 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '109#(or (and (= 5 |ULTIMATE.start_main_~input~0#1|) (<= ~a12~0 80) (= ~a21~0 8) (= ~a24~0 1) (= 5 |ULTIMATE.start_calculate_output_#in~input#1|) (<= 12 ~a12~0) (= |ULTIMATE.start_calculate_output_~input#1| 5) (= 7 ~a15~0)) (and (<= ~a12~0 80) (= ~a21~0 8) (= |ULTIMATE.start_calculate_output_~input#1| 2) (= ~a24~0 1) (<= 12 ~a12~0) (= 2 |ULTIMATE.start_calculate_output_#in~input#1|) (= 2 |ULTIMATE.start_main_~input~0#1|) (= 7 ~a15~0)) (and (= |ULTIMATE.start_calculate_output_~input#1| 6) (<= ~a12~0 80) (= ~a21~0 8) (= ~a24~0 1) (<= 12 ~a12~0) (= |ULTIMATE.start_calculate_output_#in~input#1| 6) (= 6 |ULTIMATE.start_main_~input~0#1|) (= 7 ~a15~0)) (and (= |ULTIMATE.start_main_~input~0#1| 1) (<= ~a12~0 80) (= ~a21~0 8) (= ~a24~0 1) (= |ULTIMATE.start_calculate_output_~input#1| 1) (<= 12 ~a12~0) (= |ULTIMATE.start_calculate_output_#in~input#1| 1) (= 7 ~a15~0)) (and (<= ~a12~0 80) (= ~a21~0 8) (= ~a24~0 1) (<= 12 ~a12~0) (= 3 |ULTIMATE.start_calculate_output_#in~input#1|) (= 3 |ULTIMATE.start_main_~input~0#1|) (= |ULTIMATE.start_calculate_output_~input#1| 3) (= 7 ~a15~0)) (and (= |ULTIMATE.start_main_~input~0#1| 4) (<= ~a12~0 80) (= ~a21~0 8) (= ~a24~0 1) (<= 12 ~a12~0) (= |ULTIMATE.start_calculate_output_~input#1| 4) (= |ULTIMATE.start_calculate_output_#in~input#1| 4) (= 7 ~a15~0)))' at error location [2023-12-02 19:23:43,290 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:23:43,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:23:43,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-12-02 19:23:43,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960393641] [2023-12-02 19:23:43,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:23:43,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:23:43,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:23:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:23:43,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:23:43,294 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 19:23:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:23:43,486 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-12-02 19:23:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:23:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 9 [2023-12-02 19:23:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:23:43,488 INFO L225 Difference]: With dead ends: 21 [2023-12-02 19:23:43,488 INFO L226 Difference]: Without dead ends: 19 [2023-12-02 19:23:43,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-12-02 19:23:43,490 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:23:43,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:23:43,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-02 19:23:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-12-02 19:23:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 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) [2023-12-02 19:23:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2023-12-02 19:23:43,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 9 [2023-12-02 19:23:43,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:23:43,496 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2023-12-02 19:23:43,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 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 19:23:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2023-12-02 19:23:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 19:23:43,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:23:43,497 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1] [2023-12-02 19:23:43,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:23:43,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:23:43,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 19:23:43,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:23:43,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1595800684, now seen corresponding path program 2 times [2023-12-02 19:23:43,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:23:43,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892937280] [2023-12-02 19:23:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:23:43,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:23:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:25:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:25:05,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:25:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892937280] [2023-12-02 19:25:05,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892937280] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:25:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211192918] [2023-12-02 19:25:05,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:25:05,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:25:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:25:05,795 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:25:05,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b712406a-d83f-4581-ba66-5d02331b5f0c/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:25:08,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 19:25:08,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:25:08,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 19:25:08,511 INFO L285 TraceCheckSpWp]: Computing forward predicates...