./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:32:50,783 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:32:50,891 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:32:50,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:32:50,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:32:50,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:32:50,949 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:32:50,949 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:32:50,950 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:32:50,955 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:32:50,956 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:32:50,956 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:32:50,957 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:32:50,958 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:32:50,959 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:32:50,959 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:32:50,960 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:32:50,960 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:32:50,961 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:32:50,961 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:32:50,961 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:32:50,962 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:32:50,963 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:32:50,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:32:50,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:32:50,964 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:32:50,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:32:50,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:32:50,966 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:32:50,966 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:32:50,982 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:32:50,982 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:32:50,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:32:50,983 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:32:50,983 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:32:50,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:32:50,984 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:32:50,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:32:50,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:32:50,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:50,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:32:50,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:32:50,989 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:32:50,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:32:50,990 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:32:50,990 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:32:50,990 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_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0286582125bb2879636b8cf3b934bed172850a3a3b0d880c07306d10439134a7 [2023-11-06 20:32:51,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:32:51,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:32:51,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:32:51,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:32:51,365 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:32:51,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2023-11-06 20:32:54,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:32:54,788 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:32:54,789 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_trivial_ground.i [2023-11-06 20:32:54,798 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/data/c9d8632c8/6b441cc1aa744c3c8e012fede39049f5/FLAG098004024 [2023-11-06 20:32:54,819 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/data/c9d8632c8/6b441cc1aa744c3c8e012fede39049f5 [2023-11-06 20:32:54,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:32:54,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:32:54,824 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:54,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:32:54,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:32:54,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:54" (1/1) ... [2023-11-06 20:32:54,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@656ffe54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:54, skipping insertion in model container [2023-11-06 20:32:54,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:32:54" (1/1) ... [2023-11-06 20:32:54,867 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:32:55,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:55,085 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:32:55,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:32:55,132 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:32:55,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55 WrapperNode [2023-11-06 20:32:55,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:32:55,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:55,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:32:55,135 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:32:55,143 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,151 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,182 INFO L138 Inliner]: procedures = 18, calls = 30, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 167 [2023-11-06 20:32:55,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:32:55,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:32:55,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:32:55,184 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:32:55,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,196 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,196 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,204 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,212 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:32:55,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:32:55,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:32:55,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:32:55,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (1/1) ... [2023-11-06 20:32:55,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:32:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:55,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:32:55,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:32:55,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:32:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 20:32:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:32:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 20:32:55,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:32:55,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:32:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 20:32:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-06 20:32:55,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-06 20:32:55,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:32:55,400 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:32:55,402 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:32:55,891 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:32:55,999 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:32:55,999 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-06 20:32:56,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:56 BoogieIcfgContainer [2023-11-06 20:32:56,003 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:32:56,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:32:56,005 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:32:56,008 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:32:56,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:32:54" (1/3) ... [2023-11-06 20:32:56,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3befea5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:56, skipping insertion in model container [2023-11-06 20:32:56,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:32:55" (2/3) ... [2023-11-06 20:32:56,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3befea5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:32:56, skipping insertion in model container [2023-11-06 20:32:56,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:32:56" (3/3) ... [2023-11-06 20:32:56,012 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2023-11-06 20:32:56,028 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:32:56,028 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-06 20:32:56,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:32:56,079 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@35a873c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:32:56,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-06 20:32:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 37 states have (on average 2.081081081081081) internal successors, (77), 63 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:32:56,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:32:56,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:56,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:32:56,096 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:32:56,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:56,106 INFO L85 PathProgramCache]: Analyzing trace with hash 250182, now seen corresponding path program 1 times [2023-11-06 20:32:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:56,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910940228] [2023-11-06 20:32:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:56,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:56,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:56,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:56,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910940228] [2023-11-06 20:32:56,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910940228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:56,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:56,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:32:56,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742926720] [2023-11-06 20:32:56,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:56,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:56,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:56,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:56,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:56,440 INFO L87 Difference]: Start difference. First operand has 68 states, 37 states have (on average 2.081081081081081) internal successors, (77), 63 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:56,617 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-11-06 20:32:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-06 20:32:56,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:56,629 INFO L225 Difference]: With dead ends: 60 [2023-11-06 20:32:56,630 INFO L226 Difference]: Without dead ends: 59 [2023-11-06 20:32:56,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:56,638 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 55 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:56,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:56,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-06 20:32:56,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-06 20:32:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 54 states have internal predecessors, (66), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:32:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2023-11-06 20:32:56,676 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 3 [2023-11-06 20:32:56,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:56,677 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2023-11-06 20:32:56,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2023-11-06 20:32:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 20:32:56,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:56,678 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 20:32:56,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 20:32:56,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:32:56,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 250183, now seen corresponding path program 1 times [2023-11-06 20:32:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020997928] [2023-11-06 20:32:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:56,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:56,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020997928] [2023-11-06 20:32:56,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020997928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:56,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:56,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:32:56,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164126536] [2023-11-06 20:32:56,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:56,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:56,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:56,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:56,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:56,861 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:56,998 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2023-11-06 20:32:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:56,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-06 20:32:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:57,003 INFO L225 Difference]: With dead ends: 61 [2023-11-06 20:32:57,003 INFO L226 Difference]: Without dead ends: 61 [2023-11-06 20:32:57,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:57,010 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:57,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:57,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-06 20:32:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-06 20:32:57,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 56 states have internal predecessors, (68), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-06 20:32:57,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2023-11-06 20:32:57,035 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 3 [2023-11-06 20:32:57,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:57,035 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2023-11-06 20:32:57,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:57,036 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2023-11-06 20:32:57,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 20:32:57,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:57,036 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-06 20:32:57,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 20:32:57,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:32:57,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash 240636645, now seen corresponding path program 1 times [2023-11-06 20:32:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871442018] [2023-11-06 20:32:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:57,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871442018] [2023-11-06 20:32:57,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871442018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276045687] [2023-11-06 20:32:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:57,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:57,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:57,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:57,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 20:32:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:57,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 20:32:57,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:57,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 20:32:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:57,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:57,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276045687] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:57,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1915398242] [2023-11-06 20:32:57,800 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2023-11-06 20:32:57,800 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:57,807 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:57,813 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:57,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:32:58,411 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:32:58,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '351#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_#t~nondet4#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet4#1|)) (<= (select |#length| |ULTIMATE.start_main_~#set~0#1.base|) (+ 3 (* |ULTIMATE.start_main_~x~0#1| 4))) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 0) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|))' at error location [2023-11-06 20:32:58,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:32:58,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:32:58,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-06 20:32:58,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846942563] [2023-11-06 20:32:58,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:32:58,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:32:58,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:32:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-06 20:32:58,572 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:59,241 INFO L93 Difference]: Finished difference Result 225 states and 291 transitions. [2023-11-06 20:32:59,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:32:59,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 20:32:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:59,244 INFO L225 Difference]: With dead ends: 225 [2023-11-06 20:32:59,245 INFO L226 Difference]: Without dead ends: 225 [2023-11-06 20:32:59,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 20:32:59,246 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 381 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:59,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 203 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 20:32:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-06 20:32:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 128. [2023-11-06 20:32:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.6391752577319587) internal successors, (159), 114 states have internal predecessors, (159), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 20:32:59,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 183 transitions. [2023-11-06 20:32:59,263 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 183 transitions. Word has length 5 [2023-11-06 20:32:59,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:59,263 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 183 transitions. [2023-11-06 20:32:59,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:59,264 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 183 transitions. [2023-11-06 20:32:59,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:32:59,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:59,264 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-11-06 20:32:59,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 20:32:59,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:59,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:32:59,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:59,471 INFO L85 PathProgramCache]: Analyzing trace with hash 2145951374, now seen corresponding path program 1 times [2023-11-06 20:32:59,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:59,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528975214] [2023-11-06 20:32:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:59,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 20:32:59,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:59,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528975214] [2023-11-06 20:32:59,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528975214] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:32:59,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:32:59,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 20:32:59,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814155642] [2023-11-06 20:32:59,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:32:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:32:59,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:32:59,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:32:59,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:59,615 INFO L87 Difference]: Start difference. First operand 128 states and 183 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:59,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:32:59,682 INFO L93 Difference]: Finished difference Result 125 states and 180 transitions. [2023-11-06 20:32:59,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:32:59,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 20:32:59,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:32:59,686 INFO L225 Difference]: With dead ends: 125 [2023-11-06 20:32:59,686 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 20:32:59,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:32:59,688 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 40 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:32:59,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 49 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:32:59,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 20:32:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-06 20:32:59,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 97 states have (on average 1.6082474226804124) internal successors, (156), 111 states have internal predecessors, (156), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 20:32:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 180 transitions. [2023-11-06 20:32:59,706 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 180 transitions. Word has length 13 [2023-11-06 20:32:59,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:32:59,706 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 180 transitions. [2023-11-06 20:32:59,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:32:59,706 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 180 transitions. [2023-11-06 20:32:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-06 20:32:59,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:32:59,707 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2023-11-06 20:32:59,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 20:32:59,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:32:59,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:32:59,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2145951375, now seen corresponding path program 1 times [2023-11-06 20:32:59,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:32:59,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907610796] [2023-11-06 20:32:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:59,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:32:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:59,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:32:59,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907610796] [2023-11-06 20:32:59,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907610796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:32:59,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623064791] [2023-11-06 20:32:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:32:59,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:32:59,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:32:59,813 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:32:59,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 20:32:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:32:59,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:32:59,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:32:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:59,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:32:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:32:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623064791] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:32:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [349295506] [2023-11-06 20:32:59,976 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-06 20:32:59,976 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:32:59,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:32:59,976 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:32:59,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:33:00,392 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:00,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [349295506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:00,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:33:00,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6, 6] total 17 [2023-11-06 20:33:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126583327] [2023-11-06 20:33:00,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:00,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:33:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:00,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:33:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:33:00,563 INFO L87 Difference]: Start difference. First operand 125 states and 180 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:00,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:00,790 INFO L93 Difference]: Finished difference Result 117 states and 159 transitions. [2023-11-06 20:33:00,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:33:00,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-06 20:33:00,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:00,794 INFO L225 Difference]: With dead ends: 117 [2023-11-06 20:33:00,794 INFO L226 Difference]: Without dead ends: 117 [2023-11-06 20:33:00,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:33:00,795 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:00,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 117 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:33:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-06 20:33:00,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 109. [2023-11-06 20:33:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.5862068965517242) internal successors, (138), 99 states have internal predecessors, (138), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 20:33:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 154 transitions. [2023-11-06 20:33:00,818 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 154 transitions. Word has length 13 [2023-11-06 20:33:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:00,818 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 154 transitions. [2023-11-06 20:33:00,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 154 transitions. [2023-11-06 20:33:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 20:33:00,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:00,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1] [2023-11-06 20:33:00,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 20:33:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:01,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:01,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 675135613, now seen corresponding path program 1 times [2023-11-06 20:33:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:01,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816350776] [2023-11-06 20:33:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:01,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:33:01,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816350776] [2023-11-06 20:33:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816350776] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407349690] [2023-11-06 20:33:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:01,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:01,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:01,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:01,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 20:33:01,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:01,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:33:01,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:01,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:33:01,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:33:01,342 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:33:01,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407349690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:33:01,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1540223299] [2023-11-06 20:33:01,349 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2023-11-06 20:33:01,349 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:33:01,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:33:01,350 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:33:01,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:33:01,952 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:02,146 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1379#(and (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_main_~#values~0#1.base|) (+ 3 (* |ULTIMATE.start_main_~v~0#1| 4))) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet10#1| 2147483647) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 0) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|) (<= 0 |ULTIMATE.start_main_~v~0#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet10#1|)))' at error location [2023-11-06 20:33:02,148 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:33:02,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:33:02,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-06 20:33:02,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015482427] [2023-11-06 20:33:02,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:33:02,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 20:33:02,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:02,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 20:33:02,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:33:02,150 INFO L87 Difference]: Start difference. First operand 109 states and 154 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:02,630 INFO L93 Difference]: Finished difference Result 439 states and 560 transitions. [2023-11-06 20:33:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 20:33:02,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 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 15 [2023-11-06 20:33:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:02,638 INFO L225 Difference]: With dead ends: 439 [2023-11-06 20:33:02,638 INFO L226 Difference]: Without dead ends: 439 [2023-11-06 20:33:02,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:33:02,641 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 589 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:02,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 269 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:33:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-11-06 20:33:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 121. [2023-11-06 20:33:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 111 states have internal predecessors, (150), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 20:33:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2023-11-06 20:33:02,675 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 15 [2023-11-06 20:33:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:02,675 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2023-11-06 20:33:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:02,676 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2023-11-06 20:33:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-06 20:33:02,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:02,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1] [2023-11-06 20:33:02,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 20:33:02,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 20:33:02,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:02,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash 801248177, now seen corresponding path program 2 times [2023-11-06 20:33:02,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:02,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046653633] [2023-11-06 20:33:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 20:33:03,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046653633] [2023-11-06 20:33:03,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046653633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:03,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421667947] [2023-11-06 20:33:03,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:33:03,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:03,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:03,167 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:03,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 20:33:03,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 20:33:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:33:03,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 20:33:03,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:03,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 20:33:03,336 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 20:33:03,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:33:03,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421667947] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:03,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:33:03,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 16 [2023-11-06 20:33:03,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122953433] [2023-11-06 20:33:03,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:03,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:33:03,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:03,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:33:03,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-06 20:33:03,339 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:03,485 INFO L93 Difference]: Finished difference Result 165 states and 230 transitions. [2023-11-06 20:33:03,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:33:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 27 [2023-11-06 20:33:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:03,487 INFO L225 Difference]: With dead ends: 165 [2023-11-06 20:33:03,487 INFO L226 Difference]: Without dead ends: 165 [2023-11-06 20:33:03,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-11-06 20:33:03,489 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 57 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:03,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 78 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:33:03,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-06 20:33:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2023-11-06 20:33:03,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 106 states have (on average 1.5188679245283019) internal successors, (161), 117 states have internal predecessors, (161), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 20:33:03,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 177 transitions. [2023-11-06 20:33:03,496 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 177 transitions. Word has length 27 [2023-11-06 20:33:03,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:03,497 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 177 transitions. [2023-11-06 20:33:03,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:03,497 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 177 transitions. [2023-11-06 20:33:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 20:33:03,498 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:03,498 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:03,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 20:33:03,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 20:33:03,704 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:03,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash -930930034, now seen corresponding path program 1 times [2023-11-06 20:33:03,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479559936] [2023-11-06 20:33:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 20:33:03,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479559936] [2023-11-06 20:33:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479559936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:03,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059317343] [2023-11-06 20:33:03,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:03,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:03,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 20:33:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:03,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 20:33:03,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:33:04,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:33:04,320 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:33:04,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059317343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:33:04,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376778501] [2023-11-06 20:33:04,323 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-11-06 20:33:04,323 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:33:04,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:33:04,323 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:33:04,324 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:33:04,791 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:05,021 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2519#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#values~0#1.offset| 0) (= |ULTIMATE.start_main_~#set~0#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_~v~0#1| 0) (<= 2 |ULTIMATE.start_main_~#values~0#1.base|) (<= 2 |ULTIMATE.start_main_~#set~0#1.base|) (<= (select |#length| |ULTIMATE.start_main_~#values~0#1.base|) 3) (= |ULTIMATE.start_main_~x~0#1| 0))' at error location [2023-11-06 20:33:05,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:33:05,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:33:05,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 12, 12] total 26 [2023-11-06 20:33:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158905279] [2023-11-06 20:33:05,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:33:05,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 20:33:05,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 20:33:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 20:33:05,024 INFO L87 Difference]: Start difference. First operand 127 states and 177 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:07,673 INFO L93 Difference]: Finished difference Result 1659 states and 2164 transitions. [2023-11-06 20:33:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-06 20:33:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 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 28 [2023-11-06 20:33:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:07,686 INFO L225 Difference]: With dead ends: 1659 [2023-11-06 20:33:07,686 INFO L226 Difference]: Without dead ends: 1659 [2023-11-06 20:33:07,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1886, Invalid=3966, Unknown=0, NotChecked=0, Total=5852 [2023-11-06 20:33:07,691 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5328 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5374 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:07,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5374 Valid, 476 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 20:33:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2023-11-06 20:33:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 186. [2023-11-06 20:33:07,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 172 states have internal predecessors, (232), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 20:33:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 256 transitions. [2023-11-06 20:33:07,734 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 256 transitions. Word has length 28 [2023-11-06 20:33:07,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:07,735 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 256 transitions. [2023-11-06 20:33:07,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:07,735 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 256 transitions. [2023-11-06 20:33:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-06 20:33:07,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:07,738 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:07,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-06 20:33:07,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:07,945 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:07,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:07,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1554291064, now seen corresponding path program 2 times [2023-11-06 20:33:07,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:07,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957691701] [2023-11-06 20:33:07,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:07,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2023-11-06 20:33:08,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957691701] [2023-11-06 20:33:08,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957691701] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:08,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543092710] [2023-11-06 20:33:08,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 20:33:08,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:08,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:08,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:08,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 20:33:08,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 20:33:08,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:33:08,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:33:08,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:08,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 20:33:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-06 20:33:08,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:33:08,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543092710] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:08,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 20:33:08,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-06 20:33:08,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916768213] [2023-11-06 20:33:08,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:08,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:08,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:08,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:08,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:33:08,377 INFO L87 Difference]: Start difference. First operand 186 states and 256 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2023-11-06 20:33:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:08,474 INFO L93 Difference]: Finished difference Result 190 states and 254 transitions. [2023-11-06 20:33:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:08,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) Word has length 54 [2023-11-06 20:33:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:08,477 INFO L225 Difference]: With dead ends: 190 [2023-11-06 20:33:08,477 INFO L226 Difference]: Without dead ends: 190 [2023-11-06 20:33:08,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:33:08,478 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 85 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 42 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:33:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-06 20:33:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2023-11-06 20:33:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 161 states have (on average 1.4285714285714286) internal successors, (230), 170 states have internal predecessors, (230), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 20:33:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 254 transitions. [2023-11-06 20:33:08,487 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 254 transitions. Word has length 54 [2023-11-06 20:33:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:08,488 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 254 transitions. [2023-11-06 20:33:08,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2023-11-06 20:33:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 254 transitions. [2023-11-06 20:33:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-06 20:33:08,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:08,490 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:08,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:33:08,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-06 20:33:08,696 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:08,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash -974753642, now seen corresponding path program 1 times [2023-11-06 20:33:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:08,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578037718] [2023-11-06 20:33:08,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:08,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:33:09,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578037718] [2023-11-06 20:33:09,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578037718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:09,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247665709] [2023-11-06 20:33:09,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:09,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:09,560 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:09,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 20:33:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:09,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 20:33:09,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:33:09,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:33:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-06 20:33:10,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247665709] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:33:10,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588813677] [2023-11-06 20:33:10,686 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-06 20:33:10,686 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:33:10,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:33:10,687 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:33:10,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:33:11,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:11,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [588813677] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:11,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:33:11,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [24, 24, 24] total 55 [2023-11-06 20:33:11,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582434748] [2023-11-06 20:33:11,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:11,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:33:11,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:11,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:33:11,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=1641, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 20:33:11,366 INFO L87 Difference]: Start difference. First operand 184 states and 254 transitions. Second operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:11,619 INFO L93 Difference]: Finished difference Result 190 states and 252 transitions. [2023-11-06 20:33:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 20:33:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 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 56 [2023-11-06 20:33:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:11,621 INFO L225 Difference]: With dead ends: 190 [2023-11-06 20:33:11,621 INFO L226 Difference]: Without dead ends: 190 [2023-11-06 20:33:11,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2023-11-06 20:33:11,624 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:11,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 155 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:33:11,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-06 20:33:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 182. [2023-11-06 20:33:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 159 states have (on average 1.4088050314465408) internal successors, (224), 168 states have internal predecessors, (224), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-06 20:33:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 248 transitions. [2023-11-06 20:33:11,631 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 248 transitions. Word has length 56 [2023-11-06 20:33:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:11,631 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 248 transitions. [2023-11-06 20:33:11,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:11,632 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 248 transitions. [2023-11-06 20:33:11,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 20:33:11,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:11,633 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:11,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 20:33:11,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 20:33:11,834 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:11,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -458948485, now seen corresponding path program 1 times [2023-11-06 20:33:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:11,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142861667] [2023-11-06 20:33:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:11,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:11,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-06 20:33:11,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:11,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142861667] [2023-11-06 20:33:11,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142861667] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:11,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:33:11,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:33:11,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941224166] [2023-11-06 20:33:11,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:11,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:33:11,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:33:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:33:11,980 INFO L87 Difference]: Start difference. First operand 182 states and 248 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:12,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:12,041 INFO L93 Difference]: Finished difference Result 223 states and 302 transitions. [2023-11-06 20:33:12,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:33:12,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-06 20:33:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:12,043 INFO L225 Difference]: With dead ends: 223 [2023-11-06 20:33:12,043 INFO L226 Difference]: Without dead ends: 223 [2023-11-06 20:33:12,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:33:12,044 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 24 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:12,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 137 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:33:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-06 20:33:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2023-11-06 20:33:12,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 136 states have (on average 1.3455882352941178) internal successors, (183), 145 states have internal predecessors, (183), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-11-06 20:33:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2023-11-06 20:33:12,052 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 59 [2023-11-06 20:33:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:12,052 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2023-11-06 20:33:12,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2023-11-06 20:33:12,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 20:33:12,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:12,054 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:12,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 20:33:12,054 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:12,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -654004169, now seen corresponding path program 1 times [2023-11-06 20:33:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:12,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965114624] [2023-11-06 20:33:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:12,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 487 trivial. 0 not checked. [2023-11-06 20:33:12,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965114624] [2023-11-06 20:33:12,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965114624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:12,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595006947] [2023-11-06 20:33:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:12,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:12,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:12,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:12,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 20:33:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:12,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 20:33:12,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:13,010 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 20:33:13,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:33:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 20:33:13,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595006947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:33:13,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1910685121] [2023-11-06 20:33:13,937 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-11-06 20:33:13,938 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:33:13,938 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:33:13,938 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:33:13,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:33:14,538 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:15,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1910685121] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:33:15,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:33:15,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [3, 24, 24] total 60 [2023-11-06 20:33:15,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692245807] [2023-11-06 20:33:15,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:33:15,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 20:33:15,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 20:33:15,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1551, Invalid=2109, Unknown=0, NotChecked=0, Total=3660 [2023-11-06 20:33:15,125 INFO L87 Difference]: Start difference. First operand 155 states and 199 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) [2023-11-06 20:33:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:15,310 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2023-11-06 20:33:15,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 20:33:15,311 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 63 [2023-11-06 20:33:15,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:15,312 INFO L225 Difference]: With dead ends: 70 [2023-11-06 20:33:15,312 INFO L226 Difference]: Without dead ends: 70 [2023-11-06 20:33:15,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1655, Invalid=2251, Unknown=0, NotChecked=0, Total=3906 [2023-11-06 20:33:15,314 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 3 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:15,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:33:15,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-06 20:33:15,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-06 20:33:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:15,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2023-11-06 20:33:15,317 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 63 [2023-11-06 20:33:15,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:15,317 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2023-11-06 20:33:15,318 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) [2023-11-06 20:33:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2023-11-06 20:33:15,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-06 20:33:15,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:15,328 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:15,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-06 20:33:15,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 20:33:15,534 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:15,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1579827120, now seen corresponding path program 1 times [2023-11-06 20:33:15,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:15,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678013451] [2023-11-06 20:33:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 20:33:16,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 20:33:16,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678013451] [2023-11-06 20:33:16,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678013451] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 20:33:16,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438210806] [2023-11-06 20:33:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:16,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:33:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:16,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:33:16,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 20:33:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:33:16,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-06 20:33:16,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:33:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 20:33:16,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:33:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-06 20:33:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438210806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:33:17,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2012077911] [2023-11-06 20:33:17,469 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-11-06 20:33:17,469 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 20:33:17,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 20:33:17,470 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 20:33:17,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 20:33:18,118 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 20:33:18,785 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7179#(and (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 100000 |ULTIMATE.start_main_~v~0#1|) (= 0 |ULTIMATE.start_elem_exists_#res#1|) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#set~0#1.base_43| Int) (|v_ULTIMATE.start_main_~#values~0#1.base_39| Int) (|v_#valid_83| (Array Int Int))) (and (= (select |v_#valid_83| |v_ULTIMATE.start_main_~#values~0#1.base_39|) 1) (= (store (store |v_#valid_83| |v_ULTIMATE.start_main_~#set~0#1.base_43| 0) |v_ULTIMATE.start_main_~#values~0#1.base_39| 0) |#valid|) (<= 2 |v_ULTIMATE.start_main_~#values~0#1.base_39|) (<= (* |ULTIMATE.start_main_~v~0#1| 4) (select |#length| |v_ULTIMATE.start_main_~#values~0#1.base_39|)) (<= 2 |v_ULTIMATE.start_main_~#set~0#1.base_43|))) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-11-06 20:33:18,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 20:33:18,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 20:33:18,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-06 20:33:18,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348283100] [2023-11-06 20:33:18,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 20:33:18,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-06 20:33:18,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 20:33:18,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-06 20:33:18,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1752, Invalid=2030, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 20:33:18,790 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:18,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:33:18,973 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2023-11-06 20:33:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 20:33:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-11-06 20:33:18,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:33:18,975 INFO L225 Difference]: With dead ends: 118 [2023-11-06 20:33:18,975 INFO L226 Difference]: Without dead ends: 118 [2023-11-06 20:33:18,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1752, Invalid=2030, Unknown=0, NotChecked=0, Total=3782 [2023-11-06 20:33:18,978 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:33:18,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:33:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-06 20:33:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-06 20:33:18,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:18,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2023-11-06 20:33:18,982 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 69 [2023-11-06 20:33:18,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:33:18,982 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2023-11-06 20:33:18,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 48 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:33:18,983 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2023-11-06 20:33:18,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-06 20:33:18,984 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:33:18,984 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:33:18,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 20:33:19,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_37da79d3-68bc-488a-9e2b-c7fbbd36b14e/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 20:33:19,191 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:33:19,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:33:19,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1208990848, now seen corresponding path program 2 times [2023-11-06 20:33:19,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 20:33:19,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625407635] [2023-11-06 20:33:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:33:19,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 20:33:19,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat