./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-fst-shared.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-fst-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 64bit --witnessprinter.graph.data.programhash b71f005f6b63440309c4e24d3866ac559942cc4e42efba34dd3f9c28733bd7e5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:25:38,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:25:38,863 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 13:25:38,867 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:25:38,868 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:25:38,893 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:25:38,894 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:25:38,895 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:25:38,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:25:38,896 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:25:38,896 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:25:38,897 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:25:38,897 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:25:38,898 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:25:38,898 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:25:38,899 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:25:38,899 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:25:38,900 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:25:38,900 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:25:38,901 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:25:38,901 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:25:38,902 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:25:38,903 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 13:25:38,903 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 13:25:38,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:25:38,904 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:25:38,905 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:25:38,905 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 13:25:38,905 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 13:25:38,906 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 13:25:38,906 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:25:38,906 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:25:38,907 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:25:38,907 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:25:38,907 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:25:38,908 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:25:38,908 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:25:38,908 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:25:38,908 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:25:38,908 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:25:38,908 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:25:38,909 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:25:38,909 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:25:38,909 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:25:38,909 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:25:38,910 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_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b71f005f6b63440309c4e24d3866ac559942cc4e42efba34dd3f9c28733bd7e5 [2023-12-02 13:25:39,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:25:39,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:25:39,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:25:39,133 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:25:39,134 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:25:39,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-fst-shared.i [2023-12-02 13:25:41,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:25:42,156 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:25:42,157 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/sv-benchmarks/c/memsafety-broom/sll-fst-shared.i [2023-12-02 13:25:42,183 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data/e01d8a5c1/cfb6b35f01fb4d5694e174444b0e9c58/FLAGdbe3ce69b [2023-12-02 13:25:42,195 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data/e01d8a5c1/cfb6b35f01fb4d5694e174444b0e9c58 [2023-12-02 13:25:42,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:25:42,199 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:25:42,201 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:25:42,201 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:25:42,205 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:25:42,206 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,207 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a2c7ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42, skipping insertion in model container [2023-12-02 13:25:42,207 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,263 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:25:42,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:25:42,523 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:25:42,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:25:42,597 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:25:42,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42 WrapperNode [2023-12-02 13:25:42,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:25:42,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:25:42,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:25:42,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:25:42,607 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,645 INFO L138 Inliner]: procedures = 121, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 75 [2023-12-02 13:25:42,646 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:25:42,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:25:42,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:25:42,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:25:42,656 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,656 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,660 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,660 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,667 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,672 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:25:42,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:25:42,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:25:42,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:25:42,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (1/1) ... [2023-12-02 13:25:42,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:25:42,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:25:42,710 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:25:42,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:25:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:25:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 13:25:42,743 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 13:25:42,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:25:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:25:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:25:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:25:42,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:25:42,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:25:42,857 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:25:42,858 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:25:43,079 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:25:43,132 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:25:43,132 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 13:25:43,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:25:43 BoogieIcfgContainer [2023-12-02 13:25:43,134 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:25:43,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:25:43,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:25:43,139 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:25:43,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:25:42" (1/3) ... [2023-12-02 13:25:43,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536fe14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:25:43, skipping insertion in model container [2023-12-02 13:25:43,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:25:42" (2/3) ... [2023-12-02 13:25:43,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2536fe14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:25:43, skipping insertion in model container [2023-12-02 13:25:43,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:25:43" (3/3) ... [2023-12-02 13:25:43,141 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-fst-shared.i [2023-12-02 13:25:43,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:25:43,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2023-12-02 13:25:43,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:25:43,201 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;@17e16d6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:25:43,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-12-02 13:25:43,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 27 states have (on average 2.259259259259259) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:25:43,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:43,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:25:43,212 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:43,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash 4876116, now seen corresponding path program 1 times [2023-12-02 13:25:43,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96279085] [2023-12-02 13:25:43,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:43,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:43,473 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96279085] [2023-12-02 13:25:43,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96279085] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:43,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:43,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:25:43,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687022635] [2023-12-02 13:25:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:25:43,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:25:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:43,514 INFO L87 Difference]: Start difference. First operand has 60 states, 27 states have (on average 2.259259259259259) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:25:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:43,606 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-12-02 13:25:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:25:43,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:25:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:43,616 INFO L225 Difference]: With dead ends: 59 [2023-12-02 13:25:43,617 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 13:25:43,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:43,622 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:43,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 13:25:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-02 13:25:43,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-12-02 13:25:43,660 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 4 [2023-12-02 13:25:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:43,660 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-12-02 13:25:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:25:43,661 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-12-02 13:25:43,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:25:43,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:43,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:25:43,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:25:43,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:43,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash 4876117, now seen corresponding path program 1 times [2023-12-02 13:25:43,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:43,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054053272] [2023-12-02 13:25:43,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:43,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:43,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:43,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054053272] [2023-12-02 13:25:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054053272] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:25:43,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730038960] [2023-12-02 13:25:43,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:43,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:25:43,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:25:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:43,756 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:25:43,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:43,819 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2023-12-02 13:25:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:25:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:25:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:43,821 INFO L225 Difference]: With dead ends: 57 [2023-12-02 13:25:43,821 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 13:25:43,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:43,823 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:43,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:43,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 13:25:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 13:25:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 27 states have (on average 2.111111111111111) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-02 13:25:43,831 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 4 [2023-12-02 13:25:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:43,832 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-02 13:25:43,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:25:43,832 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-02 13:25:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:25:43,833 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:43,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:43,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:25:43,833 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:43,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash -760919924, now seen corresponding path program 1 times [2023-12-02 13:25:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:43,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960105470] [2023-12-02 13:25:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:43,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:43,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:43,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960105470] [2023-12-02 13:25:43,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960105470] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:43,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:43,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:25:43,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29073339] [2023-12-02 13:25:43,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:43,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:25:43,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:25:43,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:43,912 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:43,969 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2023-12-02 13:25:43,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:25:43,969 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-12-02 13:25:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:43,972 INFO L225 Difference]: With dead ends: 60 [2023-12-02 13:25:43,972 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 13:25:43,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:43,974 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:43,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:25:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 13:25:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-12-02 13:25:43,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 27 states have (on average 2.074074074074074) internal successors, (56), 52 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-12-02 13:25:43,984 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 7 [2023-12-02 13:25:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-12-02 13:25:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-12-02 13:25:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:25:43,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:43,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:43,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:25:43,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:43,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash -760919923, now seen corresponding path program 1 times [2023-12-02 13:25:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:43,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401434694] [2023-12-02 13:25:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:43,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:44,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:44,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401434694] [2023-12-02 13:25:44,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401434694] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:44,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:44,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:25:44,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922907186] [2023-12-02 13:25:44,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:44,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:25:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:25:44,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:44,077 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:44,128 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-12-02 13:25:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:25:44,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-12-02 13:25:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:44,130 INFO L225 Difference]: With dead ends: 59 [2023-12-02 13:25:44,130 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 13:25:44,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:25:44,131 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:44,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:25:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 13:25:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-12-02 13:25:44,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 2.037037037037037) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:44,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-02 13:25:44,138 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 7 [2023-12-02 13:25:44,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:44,139 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-02 13:25:44,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,139 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-02 13:25:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:25:44,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:44,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:44,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:25:44,140 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:44,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677552, now seen corresponding path program 1 times [2023-12-02 13:25:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:44,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530157124] [2023-12-02 13:25:44,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:44,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:44,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530157124] [2023-12-02 13:25:44,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530157124] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:44,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:44,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:25:44,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28038264] [2023-12-02 13:25:44,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:44,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:25:44,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:44,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:25:44,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:25:44,301 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:44,402 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-12-02 13:25:44,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:25:44,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-12-02 13:25:44,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:44,404 INFO L225 Difference]: With dead ends: 56 [2023-12-02 13:25:44,404 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 13:25:44,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:25:44,405 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:44,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 13:25:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2023-12-02 13:25:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 48 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-12-02 13:25:44,412 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 8 [2023-12-02 13:25:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:44,412 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-12-02 13:25:44,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,412 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-12-02 13:25:44,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:25:44,413 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:44,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:44,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:25:44,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:44,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:44,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677551, now seen corresponding path program 1 times [2023-12-02 13:25:44,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:44,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406071376] [2023-12-02 13:25:44,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:44,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:44,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:44,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406071376] [2023-12-02 13:25:44,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406071376] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:44,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:25:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884514776] [2023-12-02 13:25:44,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:44,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:25:44,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:25:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:25:44,618 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:44,762 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-12-02 13:25:44,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:25:44,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-12-02 13:25:44,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:44,766 INFO L225 Difference]: With dead ends: 55 [2023-12-02 13:25:44,766 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 13:25:44,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:25:44,767 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:44,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 13:25:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-12-02 13:25:44,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:44,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-12-02 13:25:44,773 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 8 [2023-12-02 13:25:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:44,773 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-12-02 13:25:44,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-12-02 13:25:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:25:44,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:44,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:44,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:25:44,775 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:44,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762607, now seen corresponding path program 1 times [2023-12-02 13:25:44,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:44,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898566861] [2023-12-02 13:25:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:44,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:44,858 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898566861] [2023-12-02 13:25:44,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898566861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:44,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:44,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:25:44,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52941169] [2023-12-02 13:25:44,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:44,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:25:44,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:44,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:25:44,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:25:44,875 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:44,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:44,990 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2023-12-02 13:25:44,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:25:44,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-02 13:25:44,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:44,991 INFO L225 Difference]: With dead ends: 71 [2023-12-02 13:25:44,991 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 13:25:44,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:25:44,992 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:44,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 104 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 13:25:44,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2023-12-02 13:25:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.868421052631579) internal successors, (71), 57 states have internal predecessors, (71), 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) [2023-12-02 13:25:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-12-02 13:25:45,000 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 13 [2023-12-02 13:25:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:45,000 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-12-02 13:25:45,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:45,001 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-12-02 13:25:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:25:45,001 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:45,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:45,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:25:45,002 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:45,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:45,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762608, now seen corresponding path program 1 times [2023-12-02 13:25:45,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:45,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638571847] [2023-12-02 13:25:45,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:45,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:45,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:45,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638571847] [2023-12-02 13:25:45,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638571847] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:45,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:45,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:25:45,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944001580] [2023-12-02 13:25:45,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:45,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:25:45,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:25:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:25:45,206 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:45,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:45,342 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2023-12-02 13:25:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:25:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-02 13:25:45,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:45,344 INFO L225 Difference]: With dead ends: 72 [2023-12-02 13:25:45,344 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 13:25:45,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:25:45,345 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:45,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 218 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 13:25:45,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-12-02 13:25:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 61 states have internal predecessors, (76), 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) [2023-12-02 13:25:45,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2023-12-02 13:25:45,352 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 13 [2023-12-02 13:25:45,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:45,352 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2023-12-02 13:25:45,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:45,352 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2023-12-02 13:25:45,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 13:25:45,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:45,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:45,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:25:45,353 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:45,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:45,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1344974105, now seen corresponding path program 1 times [2023-12-02 13:25:45,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:45,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728384664] [2023-12-02 13:25:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:45,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:45,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:45,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728384664] [2023-12-02 13:25:45,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728384664] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:45,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:45,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:25:45,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934907364] [2023-12-02 13:25:45,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:45,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:25:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:45,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:25:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:25:45,431 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:45,518 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2023-12-02 13:25:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:25:45,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 13:25:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:45,520 INFO L225 Difference]: With dead ends: 72 [2023-12-02 13:25:45,520 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 13:25:45,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:25:45,521 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:45,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 223 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 13:25:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2023-12-02 13:25:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.744186046511628) internal successors, (75), 62 states have internal predecessors, (75), 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) [2023-12-02 13:25:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2023-12-02 13:25:45,528 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 14 [2023-12-02 13:25:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:45,529 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2023-12-02 13:25:45,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:25:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2023-12-02 13:25:45,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:25:45,530 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:45,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:45,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:25:45,530 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:45,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:45,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264992, now seen corresponding path program 1 times [2023-12-02 13:25:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426432270] [2023-12-02 13:25:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:45,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:45,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:45,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426432270] [2023-12-02 13:25:45,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426432270] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:25:45,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:25:45,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:25:45,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903222725] [2023-12-02 13:25:45,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:25:45,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:25:45,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:25:45,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:25:45,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:25:45,664 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:45,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:25:45,805 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2023-12-02 13:25:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:25:45,805 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 13:25:45,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:25:45,806 INFO L225 Difference]: With dead ends: 68 [2023-12-02 13:25:45,806 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 13:25:45,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:25:45,807 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:25:45,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:25:45,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 13:25:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-12-02 13:25:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 62 states have internal predecessors, (74), 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) [2023-12-02 13:25:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2023-12-02 13:25:45,812 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 15 [2023-12-02 13:25:45,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:25:45,813 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2023-12-02 13:25:45,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:25:45,813 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2023-12-02 13:25:45,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:25:45,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:25:45,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:25:45,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 13:25:45,814 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:25:45,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:25:45,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264991, now seen corresponding path program 1 times [2023-12-02 13:25:45,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:25:45,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025190370] [2023-12-02 13:25:45,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:45,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:25:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:46,110 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:25:46,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:25:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025190370] [2023-12-02 13:25:46,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025190370] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:25:46,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579659997] [2023-12-02 13:25:46,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:25:46,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:25:46,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:25:46,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:25:46,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:25:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:25:46,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:25:46,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:25:46,395 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:25:46,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:25:46,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:25:46,454 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:25:46,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:25:46,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:25:46,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:25:46,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579659997] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:25:46,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758623607] [2023-12-02 13:25:46,633 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 13:25:46,633 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:25:46,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:25:46,642 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:25:46,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:25:47,189 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 127 for LOIs [2023-12-02 13:25:47,264 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:26:00,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1413#(and (<= 1 |#StackHeapBarrier|) (or (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_39| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_39| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_create_#t~ret8#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 0))))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_58| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_58| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_58| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_58| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_58| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_57|)) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_41| (Array Int (Array Int Int))) (|v_#memory_int_42| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_5| (Array Int (Array Int Int)))) (and (= |v_old(#memory_int)_AFTER_CALL_5| (store |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base|) 8 (select (select |v_old(#memory_int)_AFTER_CALL_5| |ULTIMATE.start_create_~now~0#1.base|) 8)))) (<= 0 (+ (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= (store |v_#memory_int_42| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_42| |ULTIMATE.start_create_~sll~0#1.base|) 0 (select (select |v_#memory_int_40| |ULTIMATE.start_create_~sll~0#1.base|) 0))) |v_#memory_int_40|) (= (store |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_41|) (<= (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647))) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_58| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_58| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_58| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)) |#memory_$Pointer$.base|)) (exists ((|v_#memory_$Pointer$.offset_55| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_71| (Array Int Int))) (and (= (select |v_#valid_71| |ULTIMATE.start_create_#t~ret8#1.base|) 0) (= |#valid| (store |v_#valid_71| |ULTIMATE.start_create_#t~ret8#1.base| 1)))) (exists ((|v_#valid_73| (Array Int Int))) (and (= (select (store |v_#valid_73| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0) (= (select |v_#valid_73| |ULTIMATE.start_create_~sll~0#1.base|) 0))) (exists ((|v_#length_60| (Array Int Int))) (= |#length| (store |v_#length_60| |ULTIMATE.start_create_#t~ret8#1.base| 16))) (exists ((|v_#memory_$Pointer$.base_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_57|)) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0))))) (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_39| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_39| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_create_#t~ret8#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 0))))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_57|)) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_59| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_59| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_59| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#valid_74| (Array Int Int))) (and (= (store |v_#valid_74| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|) (= (select |v_#valid_74| |ULTIMATE.start_create_#t~ret8#1.base|) 0))) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (exists ((|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_59| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_59| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)) |#memory_$Pointer$.base|)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_71| (Array Int Int))) (and (= 0 (select |v_#valid_71| |ULTIMATE.start_create_~sll~0#1.base|)) (= (select (store |v_#valid_71| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0))) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_41| (Array Int (Array Int Int))) (|v_#memory_int_43| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_6| (Array Int (Array Int Int)))) (and (<= 0 (+ (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= (store |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base|) 8 (select (select |v_old(#memory_int)_AFTER_CALL_6| |ULTIMATE.start_create_~now~0#1.base|) 8))) |v_old(#memory_int)_AFTER_CALL_6|) (= (store |v_#memory_int_43| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_43| |ULTIMATE.start_create_~sll~0#1.base|) 0 (select (select |v_#memory_int_40| |ULTIMATE.start_create_~sll~0#1.base|) 0))) |v_#memory_int_40|) (= (store |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_41|) (<= (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647))) (exists ((|v_#memory_$Pointer$.base_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_57|)) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0)))) (exists ((|v_#length_61| (Array Int Int))) (= |#length| (store |v_#length_61| |ULTIMATE.start_create_#t~ret8#1.base| 16))))) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_create_~now~0#1.base|) 7) (= |ULTIMATE.start_create_~data~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 13:26:00,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:26:00,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:26:00,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2023-12-02 13:26:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762898331] [2023-12-02 13:26:00,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:26:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:26:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:00,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:26:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=740, Unknown=7, NotChecked=56, Total=930 [2023-12-02 13:26:00,759 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 18 states, 14 states have (on average 1.5) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:26:01,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:01,035 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-12-02 13:26:01,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:26:01,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.5) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 15 [2023-12-02 13:26:01,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:01,036 INFO L225 Difference]: With dead ends: 69 [2023-12-02 13:26:01,036 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 13:26:01,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=158, Invalid=895, Unknown=7, NotChecked=62, Total=1122 [2023-12-02 13:26:01,038 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 27 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:01,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 229 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 185 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2023-12-02 13:26:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 13:26:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-12-02 13:26:01,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.6511627906976745) internal successors, (71), 62 states have internal predecessors, (71), 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) [2023-12-02 13:26:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2023-12-02 13:26:01,042 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 15 [2023-12-02 13:26:01,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:01,042 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2023-12-02 13:26:01,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.5) internal successors, (21), 12 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:26:01,042 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2023-12-02 13:26:01,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:26:01,043 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:01,043 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:26:01,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:01,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:01,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash -331815379, now seen corresponding path program 1 times [2023-12-02 13:26:01,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:01,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023381580] [2023-12-02 13:26:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:01,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:01,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:01,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023381580] [2023-12-02 13:26:01,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023381580] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:01,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772229997] [2023-12-02 13:26:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:01,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:26:01,658 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:26:01,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:26:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:01,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 13:26:01,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:26:01,762 INFO L378 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 6 treesize of output 5 [2023-12-02 13:26:01,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:26:01,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:26:01,882 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:26:01,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 13:26:01,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:26:01,962 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:26:02,002 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-12-02 13:26:02,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-12-02 13:26:02,021 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-12-02 13:26:02,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 17 [2023-12-02 13:26:02,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:02,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2023-12-02 13:26:02,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2023-12-02 13:26:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:02,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:26:04,988 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_create_~now~0#1.offset| Int) (|v_ULTIMATE.start_loop_~x#1.offset_27| Int) (v_ArrVal_266 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_266))) (store .cse1 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8) |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) |v_ULTIMATE.start_loop_~x#1.offset_27|))) (or (< |v_ULTIMATE.start_loop_~x#1.offset_27| 0) (= (select |c_#valid| .cse0) 1) (= .cse0 0) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_27|)))) (forall ((|ULTIMATE.start_create_~now~0#1.offset| Int) (|v_ULTIMATE.start_loop_~x#1.offset_27| Int) (v_ArrVal_265 (Array Int Int)) (|ULTIMATE.start_create_~data~0#1.offset| Int) (v_ArrVal_266 (Array Int Int))) (let ((.cse3 (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) (or (= (select (select (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_265))) (store .cse2 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) .cse3 |ULTIMATE.start_create_~data~0#1.offset|))) |c_ULTIMATE.start_create_~sll~0#1.base|) |v_ULTIMATE.start_loop_~x#1.offset_27|) 0) (< |v_ULTIMATE.start_loop_~x#1.offset_27| 0) (= (select |c_#valid| (select (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_266))) (store .cse4 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse4 |c_ULTIMATE.start_create_~now~0#1.base|) .cse3 |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) |v_ULTIMATE.start_loop_~x#1.offset_27|)) 1) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_27|))))) is different from false [2023-12-02 13:26:05,518 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:05,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 130 [2023-12-02 13:26:05,529 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:05,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 106 [2023-12-02 13:26:05,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 164 treesize of output 156 [2023-12-02 13:26:05,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 170 [2023-12-02 13:26:05,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 169 [2023-12-02 13:26:05,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:05,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 185 [2023-12-02 13:26:05,633 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:05,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 207 treesize of output 223 [2023-12-02 13:26:05,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 192 treesize of output 190 [2023-12-02 13:26:05,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 206 [2023-12-02 13:26:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772229997] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:26:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [738474951] [2023-12-02 13:26:06,642 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 13:26:06,642 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:26:06,642 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:26:06,642 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:26:06,642 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:26:07,268 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 13:26:07,279 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:26:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [738474951] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:15,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:26:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 9, 10] total 38 [2023-12-02 13:26:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627148754] [2023-12-02 13:26:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:15,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:26:15,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:15,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:26:15,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1183, Unknown=5, NotChecked=70, Total=1406 [2023-12-02 13:26:15,050 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 13 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:17,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:26:19,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:26:21,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:26:23,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:26:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:24,570 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-12-02 13:26:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:26:24,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-02 13:26:24,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:24,571 INFO L225 Difference]: With dead ends: 73 [2023-12-02 13:26:24,571 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 13:26:24,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=148, Invalid=1183, Unknown=5, NotChecked=70, Total=1406 [2023-12-02 13:26:24,572 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:24,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 119 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 418 Invalid, 4 Unknown, 0 Unchecked, 9.5s Time] [2023-12-02 13:26:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 13:26:24,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-12-02 13:26:24,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.6304347826086956) internal successors, (75), 65 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:24,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2023-12-02 13:26:24,576 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 16 [2023-12-02 13:26:24,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:24,576 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2023-12-02 13:26:24,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2023-12-02 13:26:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:26:24,577 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:24,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:24,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:26:24,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 13:26:24,778 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:24,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:24,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422936, now seen corresponding path program 1 times [2023-12-02 13:26:24,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:24,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122495695] [2023-12-02 13:26:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:24,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:26:24,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:24,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122495695] [2023-12-02 13:26:24,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122495695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:24,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:24,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:26:24,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816844830] [2023-12-02 13:26:24,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:24,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:26:24,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:26:24,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:26:24,874 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:26:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:24,992 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2023-12-02 13:26:24,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:26:24,992 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 13:26:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:24,993 INFO L225 Difference]: With dead ends: 70 [2023-12-02 13:26:24,994 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 13:26:24,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:26:24,995 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:24,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:26:24,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 13:26:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-02 13:26:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.5869565217391304) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-12-02 13:26:25,000 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 17 [2023-12-02 13:26:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:25,001 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-12-02 13:26:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:26:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-12-02 13:26:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:26:25,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:25,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:25,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 13:26:25,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:25,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:25,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422935, now seen corresponding path program 1 times [2023-12-02 13:26:25,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:25,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344195594] [2023-12-02 13:26:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:25,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344195594] [2023-12-02 13:26:25,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344195594] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:25,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:25,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:26:25,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482648682] [2023-12-02 13:26:25,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:25,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:26:25,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:26:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:26:25,226 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:26:25,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:25,384 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2023-12-02 13:26:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:26:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 13:26:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:25,385 INFO L225 Difference]: With dead ends: 69 [2023-12-02 13:26:25,385 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 13:26:25,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:26:25,386 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:25,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:26:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 13:26:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 13:26:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.5434782608695652) internal successors, (71), 63 states have internal predecessors, (71), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2023-12-02 13:26:25,390 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 17 [2023-12-02 13:26:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:25,390 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2023-12-02 13:26:25,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:26:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2023-12-02 13:26:25,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:26:25,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:25,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:25,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 13:26:25,392 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:25,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1696270501, now seen corresponding path program 1 times [2023-12-02 13:26:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:25,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317906972] [2023-12-02 13:26:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:25,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:25,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317906972] [2023-12-02 13:26:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317906972] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:25,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364276194] [2023-12-02 13:26:25,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:25,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:25,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:26:25,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:26:25,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:26:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:25,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 13:26:25,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:26:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:25,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:26:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364276194] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:25,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:26:25,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-12-02 13:26:25,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421570029] [2023-12-02 13:26:25,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:25,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:26:25,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:25,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:26:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:26:25,606 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:25,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:25,780 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-12-02 13:26:25,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:26:25,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 13:26:25,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:25,782 INFO L225 Difference]: With dead ends: 94 [2023-12-02 13:26:25,782 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 13:26:25,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:26:25,784 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:25,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 94 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:26:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 13:26:25,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2023-12-02 13:26:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.6037735849056605) internal successors, (85), 69 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2023-12-02 13:26:25,789 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 17 [2023-12-02 13:26:25,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:25,789 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2023-12-02 13:26:25,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2023-12-02 13:26:25,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:26:25,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:25,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:25,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 13:26:25,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 13:26:25,991 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:25,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:25,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1696270500, now seen corresponding path program 1 times [2023-12-02 13:26:25,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:25,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897330272] [2023-12-02 13:26:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:25,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:26,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897330272] [2023-12-02 13:26:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897330272] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897639609] [2023-12-02 13:26:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:26,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:26:26,207 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:26:26,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:26:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:26,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 13:26:26,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:26:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:26,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:26:26,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:26:26,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2023-12-02 13:26:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897639609] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:26:26,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 19 [2023-12-02 13:26:26,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370349511] [2023-12-02 13:26:26,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:26,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:26:26,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:26,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:26:26,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-12-02 13:26:26,638 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:26,904 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2023-12-02 13:26:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:26:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-12-02 13:26:26,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:26,905 INFO L225 Difference]: With dead ends: 116 [2023-12-02 13:26:26,906 INFO L226 Difference]: Without dead ends: 116 [2023-12-02 13:26:26,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:26:26,907 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:26,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 121 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:26:26,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-02 13:26:26,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2023-12-02 13:26:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.6) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:26,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2023-12-02 13:26:26,912 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 17 [2023-12-02 13:26:26,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:26,912 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2023-12-02 13:26:26,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2023-12-02 13:26:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:26:26,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:26,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:26,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 13:26:27,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:26:27,114 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:27,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1044765530, now seen corresponding path program 1 times [2023-12-02 13:26:27,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:27,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448851183] [2023-12-02 13:26:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:27,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:27,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:27,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448851183] [2023-12-02 13:26:27,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448851183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:27,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:27,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:26:27,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036863070] [2023-12-02 13:26:27,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:27,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:26:27,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:26:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:26:27,204 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:27,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:27,325 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2023-12-02 13:26:27,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:26:27,326 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 13:26:27,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:27,327 INFO L225 Difference]: With dead ends: 84 [2023-12-02 13:26:27,327 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 13:26:27,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:26:27,328 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 62 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:27,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 158 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:26:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 13:26:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2023-12-02 13:26:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 70 states have internal predecessors, (82), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:27,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2023-12-02 13:26:27,332 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 18 [2023-12-02 13:26:27,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:27,332 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2023-12-02 13:26:27,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2023-12-02 13:26:27,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:26:27,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:27,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:27,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 13:26:27,333 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:27,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:27,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1044777931, now seen corresponding path program 1 times [2023-12-02 13:26:27,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:27,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370004174] [2023-12-02 13:26:27,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:27,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:27,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:27,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370004174] [2023-12-02 13:26:27,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370004174] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:27,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:27,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 13:26:27,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466097203] [2023-12-02 13:26:27,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:27,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:26:27,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:27,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:26:27,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:26:27,543 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:27,799 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2023-12-02 13:26:27,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:26:27,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 13:26:27,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:27,800 INFO L225 Difference]: With dead ends: 100 [2023-12-02 13:26:27,800 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 13:26:27,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:26:27,801 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 56 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:27,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 217 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:26:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 13:26:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2023-12-02 13:26:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 76 states have internal predecessors, (92), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2023-12-02 13:26:27,805 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 18 [2023-12-02 13:26:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:27,805 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2023-12-02 13:26:27,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:27,805 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2023-12-02 13:26:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:26:27,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:27,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:27,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 13:26:27,807 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:27,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1971622619, now seen corresponding path program 1 times [2023-12-02 13:26:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:27,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015405299] [2023-12-02 13:26:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:28,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:28,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015405299] [2023-12-02 13:26:28,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015405299] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:28,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:28,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 13:26:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730126600] [2023-12-02 13:26:28,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:26:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:26:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:26:28,042 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand has 10 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:28,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:28,339 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2023-12-02 13:26:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:26:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 13:26:28,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:28,340 INFO L225 Difference]: With dead ends: 99 [2023-12-02 13:26:28,340 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 13:26:28,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:26:28,341 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:28,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 185 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:26:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 13:26:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 82. [2023-12-02 13:26:28,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5166666666666666) internal successors, (91), 76 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2023-12-02 13:26:28,346 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 19 [2023-12-02 13:26:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:28,346 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2023-12-02 13:26:28,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:28,346 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2023-12-02 13:26:28,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:26:28,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:28,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:28,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 13:26:28,348 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:28,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash 990759159, now seen corresponding path program 1 times [2023-12-02 13:26:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513621738] [2023-12-02 13:26:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:28,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:28,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513621738] [2023-12-02 13:26:28,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513621738] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:28,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:28,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:26:28,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029164403] [2023-12-02 13:26:28,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:28,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:26:28,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:28,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:26:28,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:26:28,624 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:28,838 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-12-02 13:26:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:26:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 13:26:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:28,840 INFO L225 Difference]: With dead ends: 82 [2023-12-02 13:26:28,840 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 13:26:28,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:26:28,840 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:28,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 249 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:26:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 13:26:28,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-02 13:26:28,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.5) internal successors, (90), 76 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2023-12-02 13:26:28,845 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 20 [2023-12-02 13:26:28,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:28,845 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2023-12-02 13:26:28,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:28,845 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2023-12-02 13:26:28,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 13:26:28,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:28,846 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 13:26:28,847 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:28,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1363183910, now seen corresponding path program 1 times [2023-12-02 13:26:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:28,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422215587] [2023-12-02 13:26:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:29,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:29,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422215587] [2023-12-02 13:26:29,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422215587] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:29,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:29,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-12-02 13:26:29,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907127247] [2023-12-02 13:26:29,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:29,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:26:29,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:26:29,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:26:29,198 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:29,533 INFO L93 Difference]: Finished difference Result 86 states and 98 transitions. [2023-12-02 13:26:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:26:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 13:26:29,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:29,534 INFO L225 Difference]: With dead ends: 86 [2023-12-02 13:26:29,534 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 13:26:29,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:26:29,535 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:29,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 159 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:26:29,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 13:26:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2023-12-02 13:26:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 76 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:29,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-12-02 13:26:29,539 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 22 [2023-12-02 13:26:29,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:29,539 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-12-02 13:26:29,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:29,540 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-12-02 13:26:29,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 13:26:29,540 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:29,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:29,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 13:26:29,541 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:29,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:29,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1363183909, now seen corresponding path program 1 times [2023-12-02 13:26:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:29,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189969515] [2023-12-02 13:26:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:29,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:29,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:26:29,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:29,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189969515] [2023-12-02 13:26:29,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189969515] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:26:29,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:26:29,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:26:29,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540290903] [2023-12-02 13:26:29,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:26:29,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:26:29,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:26:29,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:26:29,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:26:29,680 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:29,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:26:29,860 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2023-12-02 13:26:29,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:26:29,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 13:26:29,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:26:29,862 INFO L225 Difference]: With dead ends: 88 [2023-12-02 13:26:29,862 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 13:26:29,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:26:29,863 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 53 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:26:29,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 178 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:26:29,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 13:26:29,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2023-12-02 13:26:29,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 77 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:26:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-12-02 13:26:29,867 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 22 [2023-12-02 13:26:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:26:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-12-02 13:26:29,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:26:29,868 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-12-02 13:26:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:26:29,868 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:26:29,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:26:29,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 13:26:29,869 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:26:29,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:26:29,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1859673922, now seen corresponding path program 1 times [2023-12-02 13:26:29,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:26:29,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090969055] [2023-12-02 13:26:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:29,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:26:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:26:30,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:26:30,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090969055] [2023-12-02 13:26:30,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090969055] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:30,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127736515] [2023-12-02 13:26:30,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:26:30,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:26:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:26:30,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:26:30,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:26:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:26:30,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 13:26:30,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:26:30,515 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:26:30,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:26:30,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:26:30,532 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:26:30,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:26:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:26:30,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:26:30,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127736515] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:26:30,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857832547] [2023-12-02 13:26:30,762 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 13:26:30,763 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:26:30,763 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:26:30,763 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:26:30,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:26:37,142 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:26:37,148 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:27:08,033 WARN L293 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:27:18,012 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3922#(and (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (= |ULTIMATE.start_loop_#in~x#1.base| |ULTIMATE.start_loop_~x#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~x#1.base|) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (exists ((|v_#memory_$Pointer$.base_96| (Array Int (Array Int Int))) (|v_#memory_int_75| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_96| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.base_21| Int) (|v_ULTIMATE.start_create_#t~mem9#1.offset_20| Int)) (and (= |#memory_int| (store |v_#memory_int_75| |v_ULTIMATE.start_create_#t~mem9#1.base_21| (store (select |v_#memory_int_75| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|) (select (select |#memory_int| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|))))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_96| |v_ULTIMATE.start_create_#t~mem9#1.base_21| (store (select |v_#memory_$Pointer$.base_96| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|))))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_96| |v_ULTIMATE.start_create_#t~mem9#1.base_21| (store (select |v_#memory_$Pointer$.offset_96| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|))))) (<= (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|) (select |#length| |v_ULTIMATE.start_create_#t~mem9#1.base_21|)) (= (select |#valid| |v_ULTIMATE.start_create_#t~mem9#1.base_21|) 1) (<= 0 (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_20|)))) (= |ULTIMATE.start_loop_~x#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (or (< (+ |ULTIMATE.start_loop_~x#1.offset| 8) 0) (< (select |#length| |ULTIMATE.start_loop_~x#1.base|) (+ |ULTIMATE.start_loop_~x#1.offset| 16))) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_35| Int)) (and (<= 8 (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_35|)) (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_35|) 1))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|))' at error location [2023-12-02 13:27:18,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:27:18,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:27:18,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 16 [2023-12-02 13:27:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932165054] [2023-12-02 13:27:18,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:27:18,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 13:27:18,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:27:18,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 13:27:18,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=997, Unknown=7, NotChecked=64, Total=1190 [2023-12-02 13:27:18,015 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:27:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:27:18,413 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2023-12-02 13:27:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:27:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-12-02 13:27:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:27:18,414 INFO L225 Difference]: With dead ends: 87 [2023-12-02 13:27:18,414 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 13:27:18,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 41.3s TimeCoverageRelationStatistics Valid=134, Invalid=1123, Unknown=7, NotChecked=68, Total=1332 [2023-12-02 13:27:18,416 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:27:18,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 331 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 347 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2023-12-02 13:27:18,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 13:27:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-12-02 13:27:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 78 states have internal predecessors, (90), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:27:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 96 transitions. [2023-12-02 13:27:18,420 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 96 transitions. Word has length 23 [2023-12-02 13:27:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:27:18,420 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 96 transitions. [2023-12-02 13:27:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:27:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 96 transitions. [2023-12-02 13:27:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:27:18,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:27:18,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:27:18,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:27:18,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:27:18,622 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:27:18,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:27:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash -394812818, now seen corresponding path program 1 times [2023-12-02 13:27:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:27:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856286639] [2023-12-02 13:27:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:27:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:27:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:27:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:27:19,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:27:19,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856286639] [2023-12-02 13:27:19,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856286639] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:27:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843638265] [2023-12-02 13:27:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:27:19,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:27:19,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:27:19,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:27:19,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:27:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:27:19,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 13:27:19,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:27:19,228 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:27:19,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 13:27:19,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:27:19,346 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:27:19,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 13:27:19,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:27:19,431 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-12-02 13:27:19,483 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-02 13:27:19,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 13:27:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 13:27:19,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:27:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843638265] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:27:19,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1975645377] [2023-12-02 13:27:19,566 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 13:27:19,567 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:27:19,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:27:19,567 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:27:19,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:27:25,598 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:27:25,605 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:27:59,851 WARN L293 SmtUtils]: Spent 8.33s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:28:02,342 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4209#(and (= |ULTIMATE.start_create_#t~ret8#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_~now~0#1.base|) 1)))' at error location [2023-12-02 13:28:02,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:28:02,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:28:02,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-02 13:28:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010377342] [2023-12-02 13:28:02,343 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:28:02,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 13:28:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:28:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 13:28:02,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=828, Unknown=6, NotChecked=58, Total=992 [2023-12-02 13:28:02,345 INFO L87 Difference]: Start difference. First operand 84 states and 96 transitions. Second operand has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:28:02,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:28:02,843 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2023-12-02 13:28:02,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:28:02,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 25 [2023-12-02 13:28:02,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:28:02,844 INFO L225 Difference]: With dead ends: 83 [2023-12-02 13:28:02,844 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 13:28:02,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 37.1s TimeCoverageRelationStatistics Valid=108, Invalid=882, Unknown=6, NotChecked=60, Total=1056 [2023-12-02 13:28:02,845 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:28:02,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 277 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 338 Invalid, 0 Unknown, 53 Unchecked, 0.4s Time] [2023-12-02 13:28:02,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 13:28:02,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 13:28:02,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.435483870967742) internal successors, (89), 77 states have internal predecessors, (89), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:28:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-12-02 13:28:02,849 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 25 [2023-12-02 13:28:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:28:02,849 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-12-02 13:28:02,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:28:02,849 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-12-02 13:28:02,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:28:02,850 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:28:02,850 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:28:02,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-02 13:28:03,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:28:03,051 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:28:03,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:28:03,051 INFO L85 PathProgramCache]: Analyzing trace with hash -394812817, now seen corresponding path program 1 times [2023-12-02 13:28:03,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:28:03,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874251710] [2023-12-02 13:28:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:28:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:28:03,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:28:03,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874251710] [2023-12-02 13:28:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874251710] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:28:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901450085] [2023-12-02 13:28:03,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:28:03,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:28:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:28:03,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:28:03,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:28:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:28:03,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 13:28:03,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:28:03,867 INFO L378 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 [2023-12-02 13:28:03,979 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:28:03,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 13:28:04,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:28:04,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:28:04,247 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:28:04,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-12-02 13:28:04,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:28:04,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 18 [2023-12-02 13:28:04,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:28:04,417 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:28:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:28:04,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:28:04,467 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 13:28:04,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-12-02 13:28:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:28:04,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:28:04,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901450085] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:28:04,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767386627] [2023-12-02 13:28:04,703 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 13:28:04,703 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:28:04,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:28:04,703 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:28:04,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:28:10,788 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:28:10,795 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:29:00,845 WARN L293 SmtUtils]: Spent 8.31s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:29:05,487 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4493#(and (or (and (exists ((|v_#memory_$Pointer$.base_122| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (exists ((|v_#memory_$Pointer$.offset_120| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_124| (Array Int Int))) (and (= (store |v_#valid_124| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|) (= 0 (select |v_#valid_124| |ULTIMATE.start_create_#t~ret8#1.base|)))) (exists ((|v_#length_105| (Array Int Int))) (= (store |v_#length_105| |ULTIMATE.start_create_#t~ret8#1.base| 16) |#length|)) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (exists ((|v_old(#memory_$Pointer$.offset)_AFTER_CALL_42| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_42| (Array Int Int)) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_42| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~nondet7#1_29| Int) (|v_old(#length)_AFTER_CALL_42| (Array Int Int)) (|v_old(#memory_int)_AFTER_CALL_42| (Array Int (Array Int Int)))) (and (not (= |v_ULTIMATE.start_create_#t~nondet7#1_29| 0)) (<= |v_ULTIMATE.start_create_#t~nondet7#1_29| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_29| 2147483648)) (or (and (exists ((|v_ULTIMATE.start_create_~now~0#1.base_42| Int) (|v_ULTIMATE.start_create_~now~0#1.offset_38| Int)) (and (= (select |v_old(#valid)_AFTER_CALL_42| |v_ULTIMATE.start_create_~now~0#1.base_42|) 1) (<= 0 |v_ULTIMATE.start_create_~now~0#1.offset_38|) (= |ULTIMATE.start_create_~now~0#1.base| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_42| |v_ULTIMATE.start_create_~now~0#1.base_42|) |v_ULTIMATE.start_create_~now~0#1.offset_38|)) (= |ULTIMATE.start_create_~now~0#1.offset| (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_42| |v_ULTIMATE.start_create_~now~0#1.base_42|) |v_ULTIMATE.start_create_~now~0#1.offset_38|)) (<= (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_38|) (select |v_old(#length)_AFTER_CALL_42| |v_ULTIMATE.start_create_~now~0#1.base_42|)))) (exists ((|v_#memory_$Pointer$.base_130| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_128| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.base_27| Int) (|v_#memory_int_105| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.offset_24| Int)) (and (<= 0 (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|)) (= |v_old(#memory_int)_AFTER_CALL_42| (store |v_#memory_int_105| |v_ULTIMATE.start_create_#t~mem9#1.base_27| (store (select |v_#memory_int_105| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select (select |v_old(#memory_int)_AFTER_CALL_42| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|))))) (= (select |v_old(#valid)_AFTER_CALL_42| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) 1) (= (store |v_#memory_$Pointer$.base_130| |v_ULTIMATE.start_create_#t~mem9#1.base_27| (store (select |v_#memory_$Pointer$.base_130| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) |ULTIMATE.start_create_~data~0#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_42|) (<= (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select |v_old(#length)_AFTER_CALL_42| |v_ULTIMATE.start_create_#t~mem9#1.base_27|)) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_42| (store |v_#memory_$Pointer$.offset_128| |v_ULTIMATE.start_create_#t~mem9#1.base_27| (store (select |v_#memory_$Pointer$.offset_128| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) |ULTIMATE.start_create_~data~0#1.offset|)))))) (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#length_105| (Array Int Int))) (= |v_old(#length)_AFTER_CALL_42| (store (store |v_#length_105| |ULTIMATE.start_create_~sll~0#1.base| 16) |ULTIMATE.start_create_~data~0#1.base| 4))) (exists ((|v_#memory_$Pointer$.base_124| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_122| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_124| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_124|) (= (store |v_#memory_$Pointer$.base_124| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_124| |ULTIMATE.start_create_~now~0#1.base|) 8 |ULTIMATE.start_create_~data~0#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_42|))) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (exists ((|v_#memory_int_97| (Array Int (Array Int Int))) (|v_#memory_int_98| (Array Int (Array Int Int))) (|v_#memory_int_99| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_98| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_98| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_99| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_99|) (<= (select (select |v_#memory_int_99| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647) (<= 0 (+ (select (select |v_#memory_int_99| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= (store |v_#memory_int_97| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_97| |ULTIMATE.start_create_~sll~0#1.base|) 0 (select (select |v_#memory_int_98| |ULTIMATE.start_create_~sll~0#1.base|) 0))) |v_#memory_int_98|) (= |v_old(#memory_int)_AFTER_CALL_42| (store |v_#memory_int_99| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_99| |ULTIMATE.start_create_~now~0#1.base|) 8 (select (select |v_old(#memory_int)_AFTER_CALL_42| |ULTIMATE.start_create_~now~0#1.base|) 8)))))) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_124| (Array Int Int))) (and (= (select |v_#valid_124| |ULTIMATE.start_create_~sll~0#1.base|) 0) (= |v_old(#valid)_AFTER_CALL_42| (store (store |v_#valid_124| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base| 1)) (= (select (store |v_#valid_124| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0))) (exists ((|v_#memory_$Pointer$.offset_120| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_122| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_122| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_122|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_42| (store |v_#memory_$Pointer$.offset_122| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_122| |ULTIMATE.start_create_~now~0#1.base|) 8 0))))) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_~data~0#1.offset| 0))))) (exists ((|v_#memory_int_97| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_97| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_97| |ULTIMATE.start_create_#t~ret8#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 0)))))) (and (exists ((|v_#memory_$Pointer$.base_122| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (exists ((|v_#memory_$Pointer$.offset_120| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_#t~ret8#1.base|) 0 0)))) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_124| (Array Int Int))) (and (= (store |v_#valid_124| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|) (= 0 (select |v_#valid_124| |ULTIMATE.start_create_#t~ret8#1.base|)))) (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_43| (Array Int (Array Int Int))) (|v_old(#length)_AFTER_CALL_43| (Array Int Int)) (|v_old(#valid)_AFTER_CALL_43| (Array Int Int)) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_43| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~nondet7#1_29| Int) (|v_old(#memory_int)_AFTER_CALL_43| (Array Int (Array Int Int)))) (and (not (= |v_ULTIMATE.start_create_#t~nondet7#1_29| 0)) (<= |v_ULTIMATE.start_create_#t~nondet7#1_29| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_29| 2147483648)) (or (and (exists ((|v_ULTIMATE.start_create_~now~0#1.base_42| Int) (|v_ULTIMATE.start_create_~now~0#1.offset_38| Int)) (and (<= 0 |v_ULTIMATE.start_create_~now~0#1.offset_38|) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_43| |v_ULTIMATE.start_create_~now~0#1.base_42|) |v_ULTIMATE.start_create_~now~0#1.offset_38|) |ULTIMATE.start_create_~now~0#1.base|) (<= (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_38|) (select |v_old(#length)_AFTER_CALL_43| |v_ULTIMATE.start_create_~now~0#1.base_42|)) (= |ULTIMATE.start_create_~now~0#1.offset| (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_43| |v_ULTIMATE.start_create_~now~0#1.base_42|) |v_ULTIMATE.start_create_~now~0#1.offset_38|)) (= (select |v_old(#valid)_AFTER_CALL_43| |v_ULTIMATE.start_create_~now~0#1.base_42|) 1))) (exists ((|v_#memory_$Pointer$.base_130| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_128| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.base_27| Int) (|v_#memory_int_105| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.offset_24| Int)) (and (<= 0 (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|)) (= (store |v_#memory_$Pointer$.base_130| |v_ULTIMATE.start_create_#t~mem9#1.base_27| (store (select |v_#memory_$Pointer$.base_130| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) |ULTIMATE.start_create_~data~0#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_43|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_43| (store |v_#memory_$Pointer$.offset_128| |v_ULTIMATE.start_create_#t~mem9#1.base_27| (store (select |v_#memory_$Pointer$.offset_128| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) |ULTIMATE.start_create_~data~0#1.offset|))) (= 1 (select |v_old(#valid)_AFTER_CALL_43| |v_ULTIMATE.start_create_#t~mem9#1.base_27|)) (<= (+ 16 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select |v_old(#length)_AFTER_CALL_43| |v_ULTIMATE.start_create_#t~mem9#1.base_27|)) (= |v_old(#memory_int)_AFTER_CALL_43| (store |v_#memory_int_105| |v_ULTIMATE.start_create_#t~mem9#1.base_27| (store (select |v_#memory_int_105| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|) (select (select |v_old(#memory_int)_AFTER_CALL_43| |v_ULTIMATE.start_create_#t~mem9#1.base_27|) (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_24|)))))))) (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (exists ((|v_#memory_$Pointer$.offset_120| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_122| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_120| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_122| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_122|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_43| (store |v_#memory_$Pointer$.offset_122| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_122| |ULTIMATE.start_create_~now~0#1.base|) 8 0))))) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#memory_$Pointer$.base_124| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_122| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_122| |ULTIMATE.start_create_~sll~0#1.base|) 0 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_124| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_124|) (= (store |v_#memory_$Pointer$.base_124| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_124| |ULTIMATE.start_create_~now~0#1.base|) 8 |ULTIMATE.start_create_~data~0#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_43|))) (exists ((|v_#length_105| (Array Int Int))) (= |v_old(#length)_AFTER_CALL_43| (store (store |v_#length_105| |ULTIMATE.start_create_~sll~0#1.base| 16) |ULTIMATE.start_create_~data~0#1.base| 4))) (exists ((|v_#valid_124| (Array Int Int))) (and (= (select |v_#valid_124| |ULTIMATE.start_create_~sll~0#1.base|) 0) (= (select (store |v_#valid_124| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0) (= |v_old(#valid)_AFTER_CALL_43| (store (store |v_#valid_124| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base| 1)))) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_97| (Array Int (Array Int Int))) (|v_#memory_int_98| (Array Int (Array Int Int))) (|v_#memory_int_99| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_98| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_98| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_99| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_99|) (<= (select (select |v_#memory_int_99| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647) (<= 0 (+ (select (select |v_#memory_int_99| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= |v_old(#memory_int)_AFTER_CALL_43| (store |v_#memory_int_99| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_99| |ULTIMATE.start_create_~now~0#1.base|) 8 (select (select |v_old(#memory_int)_AFTER_CALL_43| |ULTIMATE.start_create_~now~0#1.base|) 8)))) (= (store |v_#memory_int_97| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_97| |ULTIMATE.start_create_~sll~0#1.base|) 0 (select (select |v_#memory_int_98| |ULTIMATE.start_create_~sll~0#1.base|) 0))) |v_#memory_int_98|))) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_~data~0#1.offset| 0))))) (exists ((|v_#length_105| (Array Int Int))) (= (store |v_#length_105| |ULTIMATE.start_create_#t~ret8#1.base| 16) |#length|)) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (exists ((|v_#memory_int_97| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_97| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_97| |ULTIMATE.start_create_#t~ret8#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 0))))))) (or (< |ULTIMATE.start_create_~now~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 13:29:05,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:29:05,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:29:05,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2023-12-02 13:29:05,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142356673] [2023-12-02 13:29:05,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:29:05,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:29:05,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:29:05,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:29:05,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1137, Unknown=15, NotChecked=68, Total=1332 [2023-12-02 13:29:05,489 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:29:07,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:29:07,098 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2023-12-02 13:29:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:29:07,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-12-02 13:29:07,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:29:07,099 INFO L225 Difference]: With dead ends: 80 [2023-12-02 13:29:07,099 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 13:29:07,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=203, Invalid=1761, Unknown=20, NotChecked=86, Total=2070 [2023-12-02 13:29:07,101 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:29:07,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 331 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 488 Invalid, 0 Unknown, 54 Unchecked, 0.5s Time] [2023-12-02 13:29:07,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 13:29:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-12-02 13:29:07,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.3870967741935485) internal successors, (86), 74 states have internal predecessors, (86), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:29:07,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2023-12-02 13:29:07,104 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2023-12-02 13:29:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:29:07,105 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2023-12-02 13:29:07,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:29:07,105 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2023-12-02 13:29:07,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 13:29:07,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:29:07,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:29:07,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 13:29:07,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 13:29:07,306 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:29:07,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:29:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash -54684972, now seen corresponding path program 1 times [2023-12-02 13:29:07,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:29:07,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098861344] [2023-12-02 13:29:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:29:07,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:29:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:29:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:29:07,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:29:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098861344] [2023-12-02 13:29:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098861344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:29:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:29:07,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:29:07,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159404495] [2023-12-02 13:29:07,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:29:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:29:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:29:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:29:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:29:07,450 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:29:07,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:29:07,633 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-12-02 13:29:07,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:29:07,633 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-12-02 13:29:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:29:07,634 INFO L225 Difference]: With dead ends: 82 [2023-12-02 13:29:07,634 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 13:29:07,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:29:07,635 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:29:07,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 112 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:29:07,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 13:29:07,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-12-02 13:29:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.380952380952381) internal successors, (87), 75 states have internal predecessors, (87), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:29:07,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-12-02 13:29:07,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 24 [2023-12-02 13:29:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:29:07,638 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-12-02 13:29:07,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:29:07,638 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-12-02 13:29:07,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:29:07,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:29:07,639 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:29:07,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 13:29:07,639 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:29:07,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:29:07,639 INFO L85 PathProgramCache]: Analyzing trace with hash -760601761, now seen corresponding path program 1 times [2023-12-02 13:29:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:29:07,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322807391] [2023-12-02 13:29:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:29:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:29:07,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:29:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:29:08,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:29:08,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322807391] [2023-12-02 13:29:08,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322807391] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:29:08,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847798818] [2023-12-02 13:29:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:29:08,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:29:08,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:29:08,127 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:29:08,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:29:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:29:08,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 13:29:08,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:29:08,569 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:29:08,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-02 13:29:08,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:29:08,853 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:29:08,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-12-02 13:29:09,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:29:09,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:29:09,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:29:09,333 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:09,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-12-02 13:29:09,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:09,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-12-02 13:29:09,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 13:29:09,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847798818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:29:09,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [601175205] [2023-12-02 13:29:09,637 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 13:29:09,637 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:29:09,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:29:09,638 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:29:09,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:29:15,582 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:29:15,587 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:29:42,531 WARN L293 SmtUtils]: Spent 6.76s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:29:44,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5005#(and (not (= (select |#valid| |ULTIMATE.start_loop_~x#1.base|) 1)) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))))' at error location [2023-12-02 13:29:44,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:29:44,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:29:44,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2023-12-02 13:29:44,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614224535] [2023-12-02 13:29:44,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:29:44,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 13:29:44,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:29:44,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 13:29:44,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1988, Unknown=7, NotChecked=0, Total=2162 [2023-12-02 13:29:44,612 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:29:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:29:45,333 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2023-12-02 13:29:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:29:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-12-02 13:29:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:29:45,334 INFO L225 Difference]: With dead ends: 88 [2023-12-02 13:29:45,334 INFO L226 Difference]: Without dead ends: 88 [2023-12-02 13:29:45,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=198, Invalid=2245, Unknown=7, NotChecked=0, Total=2450 [2023-12-02 13:29:45,336 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 15 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:29:45,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 403 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:29:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-02 13:29:45,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2023-12-02 13:29:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.4) internal successors, (91), 77 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:29:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-12-02 13:29:45,339 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 26 [2023-12-02 13:29:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:29:45,340 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-12-02 13:29:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:29:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-12-02 13:29:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:29:45,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:29:45,340 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:29:45,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 13:29:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 13:29:45,541 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:29:45,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:29:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash -760601760, now seen corresponding path program 1 times [2023-12-02 13:29:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:29:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788553999] [2023-12-02 13:29:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:29:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:29:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:29:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:29:46,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:29:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788553999] [2023-12-02 13:29:46,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788553999] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:29:46,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005617875] [2023-12-02 13:29:46,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:29:46,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:29:46,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:29:46,015 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:29:46,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:29:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:29:46,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 13:29:46,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:29:46,285 INFO L378 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 [2023-12-02 13:29:46,364 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:29:46,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:29:46,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:29:46,432 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:29:46,554 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:29:46,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 13:29:46,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:29:46,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:29:46,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:29:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:29:46,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:29:47,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:47,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2023-12-02 13:29:47,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:47,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-12-02 13:29:47,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 13:29:47,153 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:47,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 13:29:47,161 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:29:47,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 13:29:47,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:29:47,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 13:29:47,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:29:47,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 13:29:47,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005617875] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:29:47,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497733634] [2023-12-02 13:29:47,377 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 13:29:47,377 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:29:47,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:29:47,378 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:29:47,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:29:53,335 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:29:53,342 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:30:22,710 WARN L293 SmtUtils]: Spent 7.77s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:30:25,682 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5344#(and (or (< (+ |ULTIMATE.start_loop_~x#1.offset| 8) 0) (< (select |#length| |ULTIMATE.start_loop_~x#1.base|) (+ |ULTIMATE.start_loop_~x#1.offset| 16))) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))))' at error location [2023-12-02 13:30:25,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:30:25,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:30:25,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2023-12-02 13:30:25,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393539828] [2023-12-02 13:30:25,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:30:25,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 13:30:25,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:30:25,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 13:30:25,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2091, Unknown=7, NotChecked=0, Total=2256 [2023-12-02 13:30:25,685 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:30:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:30:26,720 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2023-12-02 13:30:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:30:26,721 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-12-02 13:30:26,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:30:26,722 INFO L225 Difference]: With dead ends: 85 [2023-12-02 13:30:26,722 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 13:30:26,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=217, Invalid=2638, Unknown=7, NotChecked=0, Total=2862 [2023-12-02 13:30:26,723 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 16 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:30:26,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 446 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:30:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 13:30:26,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-12-02 13:30:26,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.378787878787879) internal successors, (91), 78 states have internal predecessors, (91), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:30:26,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2023-12-02 13:30:26,727 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 26 [2023-12-02 13:30:26,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:30:26,728 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2023-12-02 13:30:26,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:30:26,728 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2023-12-02 13:30:26,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:30:26,728 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:30:26,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:30:26,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:30:26,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 13:30:26,929 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:30:26,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:30:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2103746454, now seen corresponding path program 1 times [2023-12-02 13:30:26,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:30:26,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775243661] [2023-12-02 13:30:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:30:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:30:27,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:30:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775243661] [2023-12-02 13:30:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775243661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:30:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889373315] [2023-12-02 13:30:27,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:30:27,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:30:27,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:30:27,156 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:30:27,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:30:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:30:27,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 13:30:27,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:30:27,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:30:27,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:30:27,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:30:27,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2023-12-02 13:30:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:30:27,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889373315] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:30:27,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79439269] [2023-12-02 13:30:27,587 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 13:30:27,587 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:30:27,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:30:27,588 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:30:27,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:30:33,687 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:30:33,694 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:30:57,314 WARN L293 SmtUtils]: Spent 7.65s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:31:00,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5713#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (or (< (select |#length| |ULTIMATE.start_destroy_~l#1.base|) (+ |ULTIMATE.start_destroy_~l#1.offset| 16)) (< (+ |ULTIMATE.start_destroy_~l#1.offset| 8) 0)) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|))' at error location [2023-12-02 13:31:00,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:31:00,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:00,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-12-02 13:31:00,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326118534] [2023-12-02 13:31:00,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:00,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:31:00,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:31:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1020, Unknown=4, NotChecked=0, Total=1122 [2023-12-02 13:31:00,805 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand has 18 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:31:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:01,226 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-12-02 13:31:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:31:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-12-02 13:31:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:01,227 INFO L225 Difference]: With dead ends: 91 [2023-12-02 13:31:01,227 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 13:31:01,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=112, Invalid=1144, Unknown=4, NotChecked=0, Total=1260 [2023-12-02 13:31:01,228 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 105 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:01,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 190 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:31:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 13:31:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2023-12-02 13:31:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 68 states have (on average 1.3676470588235294) internal successors, (93), 79 states have internal predecessors, (93), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:31:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2023-12-02 13:31:01,232 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 27 [2023-12-02 13:31:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:01,232 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2023-12-02 13:31:01,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.875) internal successors, (46), 17 states have internal predecessors, (46), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:31:01,233 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2023-12-02 13:31:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:31:01,233 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:01,233 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:01,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:31:01,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 13:31:01,434 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:31:01,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1327260707, now seen corresponding path program 1 times [2023-12-02 13:31:01,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:01,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881426175] [2023-12-02 13:31:01,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:01,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:31:02,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881426175] [2023-12-02 13:31:02,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881426175] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:02,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281246727] [2023-12-02 13:31:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:02,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:02,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:02,281 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:02,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:31:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:02,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-02 13:31:02,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:02,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-12-02 13:31:03,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:03,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 31 [2023-12-02 13:31:03,687 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_#t~mem13#1.base_15| Int) (|v_ULTIMATE.start_destroy_~l#1.base_29| Int)) (and (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_#t~mem13#1.base_15| 0) |v_ULTIMATE.start_destroy_~l#1.base_29| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_29|) 0) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_29| 1) |v_ULTIMATE.start_destroy_#t~mem13#1.base_15|) 0))) is different from true [2023-12-02 13:31:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-12-02 13:31:03,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:04,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2023-12-02 13:31:05,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281246727] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:05,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [107442632] [2023-12-02 13:31:05,093 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 13:31:05,093 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:05,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:31:05,094 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:31:05,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:31:06,329 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 13:31:06,336 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:31:25,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6094#(and (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_190| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_192| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_$Pointer$.offset_190| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_190| |ULTIMATE.start_create_#res#1.base|) 0 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8) (store (select (store |v_#memory_$Pointer$.offset_190| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_190| |ULTIMATE.start_create_#res#1.base|) 0 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0 (select (select |v_#memory_$Pointer$.offset_192| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0))) |v_#memory_$Pointer$.offset_192|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_192| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_192| |ULTIMATE.start_create_#res#1.base|) 8 0))))) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (<= (+ (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~l~0#1.base|) 8) 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_#length_147| (Array Int Int))) (= (store (store |v_#length_147| |ULTIMATE.start_create_#res#1.base| 16) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8) 4) |#length|)) (exists ((|v_#valid_176| (Array Int Int))) (and (= (store (store (store (store |v_#valid_176| |ULTIMATE.start_create_#res#1.base| 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8) 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~l~0#1.base|) 8) 0) |ULTIMATE.start_main_~l~0#1.base| 0) |#valid|) (= (select (store |v_#valid_176| |ULTIMATE.start_create_#res#1.base| 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0) (= (select |v_#valid_176| |ULTIMATE.start_create_#res#1.base|) 0))) (exists ((|v_#memory_$Pointer$.base_195| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_197| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_197| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_197| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8))) |#memory_$Pointer$.base|) (= |v_#memory_$Pointer$.base_197| (store (store |v_#memory_$Pointer$.base_195| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_195| |ULTIMATE.start_create_#res#1.base|) 0 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8) (store (select (store |v_#memory_$Pointer$.base_195| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_195| |ULTIMATE.start_create_#res#1.base|) 0 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0 (select (select |v_#memory_$Pointer$.base_197| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0)))))) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8) 0)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_int_165| (Array Int (Array Int Int))) (|v_#memory_int_166| (Array Int (Array Int Int))) (|v_#memory_int_167| (Array Int (Array Int Int)))) (and (= |v_#memory_int_167| (store |v_#memory_int_166| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8) (store (select |v_#memory_int_166| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0 (select (select |v_#memory_int_167| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0)))) (= |#memory_int| (store |v_#memory_int_167| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_167| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 8)))) (<= 0 (+ (select (select |v_#memory_int_167| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0) 2147483648)) (= (store |v_#memory_int_165| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_165| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |v_#memory_int_166| |ULTIMATE.start_create_#res#1.base|) 0))) |v_#memory_int_166|) (<= (select (select |v_#memory_int_167| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 8)) 0) 2147483647))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 13:31:25,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:31:25,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:31:25,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2023-12-02 13:31:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879094552] [2023-12-02 13:31:25,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:31:25,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 13:31:25,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:25,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 13:31:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2809, Unknown=5, NotChecked=106, Total=3080 [2023-12-02 13:31:25,808 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand has 28 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:31:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:28,300 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2023-12-02 13:31:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:31:28,301 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2023-12-02 13:31:28,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:28,302 INFO L225 Difference]: With dead ends: 100 [2023-12-02 13:31:28,302 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 13:31:28,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=257, Invalid=4032, Unknown=5, NotChecked=128, Total=4422 [2023-12-02 13:31:28,304 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:28,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 284 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 778 Invalid, 0 Unknown, 76 Unchecked, 1.2s Time] [2023-12-02 13:31:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 13:31:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2023-12-02 13:31:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 83 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:31:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2023-12-02 13:31:28,308 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 27 [2023-12-02 13:31:28,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:28,308 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2023-12-02 13:31:28,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:31:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2023-12-02 13:31:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:31:28,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:28,309 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:28,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-02 13:31:28,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:28,510 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:31:28,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1327261930, now seen corresponding path program 1 times [2023-12-02 13:31:28,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:28,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952647565] [2023-12-02 13:31:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:28,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:28,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:28,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952647565] [2023-12-02 13:31:28,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952647565] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:28,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692473159] [2023-12-02 13:31:28,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:28,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:28,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:28,690 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:28,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:31:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:28,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 13:31:28,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:28,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-12-02 13:31:28,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-12-02 13:31:29,089 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:29,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 13:31:29,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:29,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-02 13:31:29,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:29,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:29,614 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 13:31:29,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 53 [2023-12-02 13:31:29,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2023-12-02 13:31:29,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2023-12-02 13:31:29,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2023-12-02 13:31:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692473159] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:31:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [215175372] [2023-12-02 13:31:29,763 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:31:29,764 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:29,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:31:29,764 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:31:29,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:31:31,091 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 13:31:31,098 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:31:44,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [215175372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:31:44,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:31:44,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [7, 13, 13] total 36 [2023-12-02 13:31:44,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164007569] [2023-12-02 13:31:44,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:31:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:31:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:31:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:31:44,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1133, Unknown=2, NotChecked=0, Total=1260 [2023-12-02 13:31:44,823 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:31:47,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:31:49,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:31:51,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:31:53,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:31:57,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:31:57,415 INFO L93 Difference]: Finished difference Result 94 states and 109 transitions. [2023-12-02 13:31:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 13:31:57,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-12-02 13:31:57,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:31:57,416 INFO L225 Difference]: With dead ends: 94 [2023-12-02 13:31:57,416 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 13:31:57,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=125, Invalid=1133, Unknown=2, NotChecked=0, Total=1260 [2023-12-02 13:31:57,417 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:31:57,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 610 Invalid, 4 Unknown, 0 Unchecked, 12.6s Time] [2023-12-02 13:31:57,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 13:31:57,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-12-02 13:31:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 88 states have internal predecessors, (103), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:31:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2023-12-02 13:31:57,419 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 27 [2023-12-02 13:31:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:31:57,420 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2023-12-02 13:31:57,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:31:57,420 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2023-12-02 13:31:57,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:31:57,420 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:31:57,420 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:31:57,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:31:57,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:57,621 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:31:57,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:31:57,621 INFO L85 PathProgramCache]: Analyzing trace with hash -791630617, now seen corresponding path program 1 times [2023-12-02 13:31:57,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:31:57,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120444712] [2023-12-02 13:31:57,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:57,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:31:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:58,053 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:31:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120444712] [2023-12-02 13:31:58,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120444712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594227128] [2023-12-02 13:31:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:31:58,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:31:58,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:31:58,054 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:31:58,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:31:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:31:58,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-02 13:31:58,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:31:58,370 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:31:58,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:31:58,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:31:58,543 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:31:58,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-12-02 13:31:58,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 13:31:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:31:58,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:31:58,883 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_loop_~x#1.offset_60| Int) (v_ArrVal_1351 (Array Int Int))) (or (< |v_ULTIMATE.start_loop_~x#1.offset_60| 0) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_60|) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1351) |c_ULTIMATE.start_create_~sll~0#1.base|) |v_ULTIMATE.start_loop_~x#1.offset_60|) 0)))) is different from false [2023-12-02 13:31:58,999 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:58,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 13:31:59,013 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:31:59,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-12-02 13:31:59,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-02 13:31:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594227128] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:31:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1729215591] [2023-12-02 13:31:59,325 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:31:59,325 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:31:59,326 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:31:59,326 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:31:59,326 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:32:05,511 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 13:32:05,517 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:32:29,941 WARN L293 SmtUtils]: Spent 8.12s on a formula simplification. DAG size of input: 307 DAG size of output: 284 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:32:33,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6860#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (<= (+ |ULTIMATE.start_destroy_~l#1.offset| 16) (select |#length| |ULTIMATE.start_destroy_~l#1.base|)) (= |ULTIMATE.start_destroy_#t~mem13#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) (+ |ULTIMATE.start_destroy_~l#1.offset| 8))) (not (= |ULTIMATE.start_destroy_#t~mem13#1.offset| 0)) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (<= 0 (+ |ULTIMATE.start_destroy_~l#1.offset| 8)) (= (select |#valid| |ULTIMATE.start_destroy_~l#1.base|) 1) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) (+ |ULTIMATE.start_destroy_~l#1.offset| 8)) |ULTIMATE.start_destroy_#t~mem13#1.base|))' at error location [2023-12-02 13:32:33,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:32:33,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:32:33,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 25 [2023-12-02 13:32:33,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319906096] [2023-12-02 13:32:33,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:32:33,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 13:32:33,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:32:33,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 13:32:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2006, Unknown=7, NotChecked=90, Total=2256 [2023-12-02 13:32:33,742 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:32:34,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:32:34,602 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2023-12-02 13:32:34,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:32:34,602 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-12-02 13:32:34,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:32:34,603 INFO L225 Difference]: With dead ends: 95 [2023-12-02 13:32:34,603 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 13:32:34,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=200, Invalid=2449, Unknown=7, NotChecked=100, Total=2756 [2023-12-02 13:32:34,605 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:32:34,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 530 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:32:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 13:32:34,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2023-12-02 13:32:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 88 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:32:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2023-12-02 13:32:34,610 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 28 [2023-12-02 13:32:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:32:34,610 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2023-12-02 13:32:34,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:32:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2023-12-02 13:32:34,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:32:34,610 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:32:34,610 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:32:34,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 13:32:34,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:34,811 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:32:34,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:32:34,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1162478973, now seen corresponding path program 2 times [2023-12-02 13:32:34,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:32:34,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833621407] [2023-12-02 13:32:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:32:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:32:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:32:35,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:35,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:32:35,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833621407] [2023-12-02 13:32:35,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833621407] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:32:35,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984200322] [2023-12-02 13:32:35,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:32:35,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:32:35,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:32:35,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:32:35,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:32:35,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 13:32:35,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:32:35,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 74 conjunts are in the unsatisfiable core [2023-12-02 13:32:35,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:32:35,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:32:35,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:32:35,985 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:32:35,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:32:36,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:32:36,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 13:32:36,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:32:36,153 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 13:32:36,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 66 [2023-12-02 13:32:36,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:32:36,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 25 [2023-12-02 13:32:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:32:36,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:32:38,624 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base|)) (.cse3 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base|)) (.cse2 (+ |c_ULTIMATE.start_create_#t~mem9#1.offset| 8))) (and (forall ((v_ArrVal_1444 Int) (v_ArrVal_1443 Int)) (= (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| (store .cse3 .cse2 v_ArrVal_1443)))) (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| (store .cse1 .cse2 v_ArrVal_1444)) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) 0)) (forall ((v_ArrVal_1444 Int) (v_ArrVal_1443 Int)) (= (select (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| (store .cse1 .cse2 v_ArrVal_1444)))) (select .cse4 (select (select .cse4 |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| (store .cse3 .cse2 v_ArrVal_1443)) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) 0)))) is different from false [2023-12-02 13:32:48,287 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_#t~ret8#1.offset|))) (.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_#t~ret8#1.base|)))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_create_#t~ret8#1.base|)) (.cse5 (select .cse4 |c_ULTIMATE.start_create_#t~ret8#1.base|))) (and (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_44| Int)) (or (forall ((v_ArrVal_1444 Int) (v_ArrVal_1443 Int)) (= (let ((.cse3 (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_44|))) (let ((.cse0 (store .cse4 |c_ULTIMATE.start_create_#t~ret8#1.base| (store .cse5 .cse3 v_ArrVal_1443)))) (select (select .cse0 (select (select (store .cse1 |c_ULTIMATE.start_create_#t~ret8#1.base| (store .cse2 .cse3 v_ArrVal_1444)) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (select (select .cse0 |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) 0)) (< |v_ULTIMATE.start_create_#t~mem9#1.offset_44| |c_ULTIMATE.start_create_#t~ret8#1.offset|))) (forall ((|v_ULTIMATE.start_create_#t~mem9#1.offset_44| Int)) (or (< |v_ULTIMATE.start_create_#t~mem9#1.offset_44| |c_ULTIMATE.start_create_#t~ret8#1.offset|) (forall ((v_ArrVal_1444 Int) (v_ArrVal_1443 Int)) (= (let ((.cse7 (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_44|))) (select (let ((.cse6 (store .cse1 |c_ULTIMATE.start_create_#t~ret8#1.base| (store .cse2 .cse7 v_ArrVal_1444)))) (select .cse6 (select (select .cse6 |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (select (select (store .cse4 |c_ULTIMATE.start_create_#t~ret8#1.base| (store .cse5 .cse7 v_ArrVal_1443)) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) 0))))))) is different from false [2023-12-02 13:32:49,819 INFO L349 Elim1Store]: treesize reduction 1365, result has 47.7 percent of original size [2023-12-02 13:32:49,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 6861 treesize of output 4967 [2023-12-02 13:32:50,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:32:50,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 7488 treesize of output 7624 [2023-12-02 13:32:56,695 WARN L293 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 575 DAG size of output: 357 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 13:32:56,696 INFO L349 Elim1Store]: treesize reduction 2069, result has 42.6 percent of original size [2023-12-02 13:32:56,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 107 case distinctions, treesize of input 22245 treesize of output 13554 [2023-12-02 13:32:59,399 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:32:59,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 14444 treesize of output 14242 [2023-12-02 13:37:30,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 101 [2023-12-02 13:37:30,746 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 13:37:30,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 13:37:30,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536533128] [2023-12-02 13:37:30,749 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 13:37:30,749 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:37:30,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:37:30,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:37:30,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:37:30,755 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 13:37:30,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:37:30,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-02 13:37:30,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627182528] [2023-12-02 13:37:30,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 13:37:30,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:37:30,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:37:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:37:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=532, Unknown=3, NotChecked=94, Total=702 [2023-12-02 13:37:30,760 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 18 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:30,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=73, Invalid=532, Unknown=3, NotChecked=94, Total=702 [2023-12-02 13:37:30,762 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:30,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 13:37:30,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:37:30,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:30,963 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 13:37:30,965 INFO L158 Benchmark]: Toolchain (without parser) took 708765.57ms. Allocated memory was 140.5MB in the beginning and 520.1MB in the end (delta: 379.6MB). Free memory was 107.9MB in the beginning and 192.9MB in the end (delta: -85.0MB). Peak memory consumption was 297.0MB. Max. memory is 16.1GB. [2023-12-02 13:37:30,965 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 104.9MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 13:37:30,965 INFO L158 Benchmark]: CACSL2BoogieTranslator took 397.40ms. Allocated memory is still 140.5MB. Free memory was 107.9MB in the beginning and 87.7MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 13:37:30,965 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.07ms. Allocated memory is still 140.5MB. Free memory was 87.1MB in the beginning and 85.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:37:30,965 INFO L158 Benchmark]: Boogie Preprocessor took 30.66ms. Allocated memory is still 140.5MB. Free memory was 85.6MB in the beginning and 83.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 13:37:30,966 INFO L158 Benchmark]: RCFGBuilder took 455.81ms. Allocated memory is still 140.5MB. Free memory was 83.5MB in the beginning and 62.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-12-02 13:37:30,966 INFO L158 Benchmark]: TraceAbstraction took 707828.32ms. Allocated memory was 140.5MB in the beginning and 520.1MB in the end (delta: 379.6MB). Free memory was 61.9MB in the beginning and 192.9MB in the end (delta: -131.0MB). Peak memory consumption was 250.9MB. Max. memory is 16.1GB. [2023-12-02 13:37:30,967 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 104.9MB. Free memory is still 51.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 397.40ms. Allocated memory is still 140.5MB. Free memory was 107.9MB in the beginning and 87.7MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 47.07ms. Allocated memory is still 140.5MB. Free memory was 87.1MB in the beginning and 85.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.66ms. Allocated memory is still 140.5MB. Free memory was 85.6MB in the beginning and 83.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 455.81ms. Allocated memory is still 140.5MB. Free memory was 83.5MB in the beginning and 62.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 707828.32ms. Allocated memory was 140.5MB in the beginning and 520.1MB in the end (delta: 379.6MB). Free memory was 61.9MB in the beginning and 192.9MB in the end (delta: -131.0MB). Peak memory consumption was 250.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-fst-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --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 64bit --witnessprinter.graph.data.programhash b71f005f6b63440309c4e24d3866ac559942cc4e42efba34dd3f9c28733bd7e5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:37:32,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:37:32,835 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Bitvector.epf [2023-12-02 13:37:32,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:37:32,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:37:32,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:37:32,871 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:37:32,872 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:37:32,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:37:32,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:37:32,874 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:37:32,875 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:37:32,875 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:37:32,876 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:37:32,876 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:37:32,877 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:37:32,878 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 13:37:32,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 13:37:32,879 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:37:32,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:37:32,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:37:32,881 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 13:37:32,881 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 13:37:32,882 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 13:37:32,882 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:37:32,883 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:37:32,883 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 13:37:32,884 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 13:37:32,884 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:37:32,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:37:32,885 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:37:32,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 13:37:32,886 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:37:32,886 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:37:32,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:37:32,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:37:32,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:37:32,887 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 13:37:32,888 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 13:37:32,888 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:37:32,888 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:37:32,888 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:37:32,889 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b71f005f6b63440309c4e24d3866ac559942cc4e42efba34dd3f9c28733bd7e5 [2023-12-02 13:37:33,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:37:33,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:37:33,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:37:33,207 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:37:33,207 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:37:33,208 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-fst-shared.i [2023-12-02 13:37:36,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:37:36,341 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:37:36,342 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/sv-benchmarks/c/memsafety-broom/sll-fst-shared.i [2023-12-02 13:37:36,369 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data/8929fb1e4/793a0ba1055c4fcea640e4ae73f04287/FLAG8b5614862 [2023-12-02 13:37:36,384 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/data/8929fb1e4/793a0ba1055c4fcea640e4ae73f04287 [2023-12-02 13:37:36,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:37:36,388 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:37:36,389 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:37:36,389 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:37:36,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:37:36,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f82baca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36, skipping insertion in model container [2023-12-02 13:37:36,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:37:36,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:37:36,828 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:37:36,868 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:37:36,902 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:37:36,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36 WrapperNode [2023-12-02 13:37:36,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:37:36,903 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:37:36,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:37:36,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:37:36,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,954 INFO L138 Inliner]: procedures = 122, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2023-12-02 13:37:36,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:37:36,955 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:37:36,955 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:37:36,956 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:37:36,966 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,966 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,971 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,971 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,989 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,993 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,995 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:36,997 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:37,000 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:37:37,001 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:37:37,002 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:37:37,002 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:37:37,003 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (1/1) ... [2023-12-02 13:37:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:37:37,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:37,038 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:37:37,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:37:37,074 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 13:37:37,074 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 13:37:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:37:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:37:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:37:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:37:37,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 13:37:37,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:37:37,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:37:37,199 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:37:37,202 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:37:37,673 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:37:37,720 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:37:37,720 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 13:37:37,720 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:37 BoogieIcfgContainer [2023-12-02 13:37:37,721 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:37:37,723 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:37:37,723 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:37:37,726 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:37:37,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:37:36" (1/3) ... [2023-12-02 13:37:37,727 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcdf268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:37:37, skipping insertion in model container [2023-12-02 13:37:37,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:37:36" (2/3) ... [2023-12-02 13:37:37,728 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcdf268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:37:37, skipping insertion in model container [2023-12-02 13:37:37,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:37:37" (3/3) ... [2023-12-02 13:37:37,729 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-fst-shared.i [2023-12-02 13:37:37,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:37:37,748 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2023-12-02 13:37:37,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:37:37,800 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;@12f237ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:37:37,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-12-02 13:37:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:37,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:37:37,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:37,813 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:37:37,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:37,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash 4876116, now seen corresponding path program 1 times [2023-12-02 13:37:37,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1779634261] [2023-12-02 13:37:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:37,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:37,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:37,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 13:37:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:37,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:37:37,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:37,995 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:38,009 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:38,010 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:38,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1779634261] [2023-12-02 13:37:38,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1779634261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:38,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:38,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:37:38,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400089570] [2023-12-02 13:37:38,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:38,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:38,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:38,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,051 INFO L87 Difference]: Start difference. First operand has 62 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:37:38,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:38,276 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2023-12-02 13:37:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:38,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:37:38,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:38,286 INFO L225 Difference]: With dead ends: 61 [2023-12-02 13:37:38,286 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 13:37:38,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,292 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:38,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:37:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 13:37:38,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 13:37:38,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 56 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:38,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2023-12-02 13:37:38,325 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 4 [2023-12-02 13:37:38,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:38,326 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2023-12-02 13:37:38,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:37:38,326 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-12-02 13:37:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:37:38,327 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:38,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:37:38,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:38,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:38,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:38,529 INFO L85 PathProgramCache]: Analyzing trace with hash 4876117, now seen corresponding path program 1 times [2023-12-02 13:37:38,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:38,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1521616613] [2023-12-02 13:37:38,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:38,529 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:38,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:38,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 13:37:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:38,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:37:38,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:38,585 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:38,603 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:38,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:38,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1521616613] [2023-12-02 13:37:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1521616613] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:38,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:38,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:37:38,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211387076] [2023-12-02 13:37:38,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,608 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:37:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:38,897 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-12-02 13:37:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:38,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 13:37:38,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:38,900 INFO L225 Difference]: With dead ends: 59 [2023-12-02 13:37:38,900 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 13:37:38,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:38,902 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:38,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 89 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:37:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 13:37:38,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-02 13:37:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:38,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-12-02 13:37:38,910 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 4 [2023-12-02 13:37:38,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:38,911 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-12-02 13:37:38,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 13:37:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-12-02 13:37:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:37:38,911 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:38,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:38,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:39,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:39,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:39,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:39,113 INFO L85 PathProgramCache]: Analyzing trace with hash -760919924, now seen corresponding path program 1 times [2023-12-02 13:37:39,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:39,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1318372949] [2023-12-02 13:37:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:39,115 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:39,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:39,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:39,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 13:37:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:39,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 13:37:39,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:39,203 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:39,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:39,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1318372949] [2023-12-02 13:37:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1318372949] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:39,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:37:39,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870723872] [2023-12-02 13:37:39,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:39,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:39,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:39,214 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:39,375 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-12-02 13:37:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-12-02 13:37:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:39,379 INFO L225 Difference]: With dead ends: 62 [2023-12-02 13:37:39,380 INFO L226 Difference]: Without dead ends: 62 [2023-12-02 13:37:39,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:39,381 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:39,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 78 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:37:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-12-02 13:37:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2023-12-02 13:37:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 29 states have (on average 2.0) internal successors, (58), 54 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:39,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-12-02 13:37:39,391 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 7 [2023-12-02 13:37:39,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:39,391 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-12-02 13:37:39,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-12-02 13:37:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:37:39,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:39,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:39,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:39,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:39,593 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:39,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -760919923, now seen corresponding path program 1 times [2023-12-02 13:37:39,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:39,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1300448411] [2023-12-02 13:37:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:39,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:39,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:39,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:39,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 13:37:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:39,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 13:37:39,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:39,668 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:39,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:39,683 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:39,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1300448411] [2023-12-02 13:37:39,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1300448411] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:39,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:39,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:37:39,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325746457] [2023-12-02 13:37:39,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:39,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:37:39,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:37:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:39,686 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:39,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:39,927 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-12-02 13:37:39,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:37:39,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-12-02 13:37:39,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:39,929 INFO L225 Difference]: With dead ends: 61 [2023-12-02 13:37:39,929 INFO L226 Difference]: Without dead ends: 61 [2023-12-02 13:37:39,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:37:39,931 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:39,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:37:39,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-02 13:37:39,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2023-12-02 13:37:39,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:39,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-02 13:37:39,936 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 7 [2023-12-02 13:37:39,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:39,936 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-02 13:37:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:39,937 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-02 13:37:39,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:37:39,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:39,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:39,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:40,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:40,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:40,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:40,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677552, now seen corresponding path program 1 times [2023-12-02 13:37:40,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:40,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529444769] [2023-12-02 13:37:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:40,140 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:40,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 13:37:40,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:40,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:37:40,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:40,251 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:40,314 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 13:37:40,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 13:37:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:40,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:40,358 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:40,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529444769] [2023-12-02 13:37:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529444769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:40,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:40,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:37:40,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131140763] [2023-12-02 13:37:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:40,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:37:40,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:37:40,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:37:40,361 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:40,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:40,780 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-12-02 13:37:40,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:37:40,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-12-02 13:37:40,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:40,782 INFO L225 Difference]: With dead ends: 58 [2023-12-02 13:37:40,782 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 13:37:40,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:37:40,783 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:40,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:37:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 13:37:40,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-12-02 13:37:40,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 50 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-12-02 13:37:40,789 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 8 [2023-12-02 13:37:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:40,789 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-12-02 13:37:40,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-12-02 13:37:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:37:40,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:40,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:40,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 13:37:40,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:40,991 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:40,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:40,991 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677551, now seen corresponding path program 1 times [2023-12-02 13:37:40,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:40,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1183513173] [2023-12-02 13:37:40,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:40,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:40,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:40,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:40,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 13:37:41,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:41,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:37:41,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:41,081 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:41,089 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:41,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:37:41,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:37:41,244 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:41,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:41,278 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:41,278 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1183513173] [2023-12-02 13:37:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1183513173] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:41,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:41,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:37:41,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698106666] [2023-12-02 13:37:41,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:41,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:37:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:41,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:37:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:37:41,281 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:41,796 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-12-02 13:37:41,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:37:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-12-02 13:37:41,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:41,797 INFO L225 Difference]: With dead ends: 57 [2023-12-02 13:37:41,798 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 13:37:41,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:37:41,799 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:41,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:37:41,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 13:37:41,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2023-12-02 13:37:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-02 13:37:41,804 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 8 [2023-12-02 13:37:41,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:41,804 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-02 13:37:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:41,804 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-02 13:37:41,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:37:41,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:41,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:41,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:42,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:42,006 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:42,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762607, now seen corresponding path program 1 times [2023-12-02 13:37:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:42,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361510811] [2023-12-02 13:37:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:42,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:42,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 13:37:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:42,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:37:42,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:42,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:42,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361510811] [2023-12-02 13:37:42,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361510811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:42,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:42,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:37:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696706493] [2023-12-02 13:37:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:42,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:37:42,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:37:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:37:42,131 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:42,488 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-12-02 13:37:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:37:42,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-02 13:37:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:42,490 INFO L225 Difference]: With dead ends: 74 [2023-12-02 13:37:42,490 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 13:37:42,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:37:42,491 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 26 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:42,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 115 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:37:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 13:37:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2023-12-02 13:37:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 40 states have (on average 1.825) internal successors, (73), 59 states have internal predecessors, (73), 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) [2023-12-02 13:37:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2023-12-02 13:37:42,498 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 13 [2023-12-02 13:37:42,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:42,498 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2023-12-02 13:37:42,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:42,498 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2023-12-02 13:37:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 13:37:42,499 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:42,499 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:42,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 13:37:42,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:42,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:42,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:42,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762608, now seen corresponding path program 1 times [2023-12-02 13:37:42,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:42,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002939004] [2023-12-02 13:37:42,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:42,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:42,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:42,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:42,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 13:37:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:42,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:37:42,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:42,960 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:42,960 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:42,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002939004] [2023-12-02 13:37:42,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002939004] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:42,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:37:42,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123304220] [2023-12-02 13:37:42,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:42,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:37:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:42,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:37:42,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:37:42,962 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:43,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:43,426 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2023-12-02 13:37:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:37:43,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-02 13:37:43,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:43,428 INFO L225 Difference]: With dead ends: 75 [2023-12-02 13:37:43,428 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 13:37:43,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:37:43,429 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 17 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:43,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 238 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:37:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 13:37:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2023-12-02 13:37:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 63 states have internal predecessors, (78), 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) [2023-12-02 13:37:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2023-12-02 13:37:43,435 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 13 [2023-12-02 13:37:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:43,436 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2023-12-02 13:37:43,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2023-12-02 13:37:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:37:43,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:43,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:43,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-12-02 13:37:43,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:43,637 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:43,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264992, now seen corresponding path program 1 times [2023-12-02 13:37:43,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:43,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570890561] [2023-12-02 13:37:43,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:43,639 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:43,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:43,640 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:43,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 13:37:43,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:43,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 13:37:43,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:43,805 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_~pi~0.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 13:37:43,827 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 13:37:43,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 13:37:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:43,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:43,839 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:43,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570890561] [2023-12-02 13:37:43,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570890561] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:43,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:43,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:37:43,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172076807] [2023-12-02 13:37:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:43,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:37:43,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:37:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-12-02 13:37:43,841 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:44,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:44,047 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2023-12-02 13:37:44,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:37:44,048 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 13:37:44,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:44,049 INFO L225 Difference]: With dead ends: 69 [2023-12-02 13:37:44,049 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 13:37:44,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-12-02 13:37:44,049 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:44,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 88 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2023-12-02 13:37:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 13:37:44,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-12-02 13:37:44,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.75) 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) [2023-12-02 13:37:44,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2023-12-02 13:37:44,055 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 15 [2023-12-02 13:37:44,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:44,056 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2023-12-02 13:37:44,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:44,056 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2023-12-02 13:37:44,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:37:44,057 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:44,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:44,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-12-02 13:37:44,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:44,258 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:44,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:44,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264991, now seen corresponding path program 1 times [2023-12-02 13:37:44,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834641063] [2023-12-02 13:37:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:44,259 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:44,260 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:44,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 13:37:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:44,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:37:44,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:44,399 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:44,406 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:44,522 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 13:37:44,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-12-02 13:37:44,551 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:44,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:44,706 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) (_ bv0 1)) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:37:44,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:37:44,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:37:44,750 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:44,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:37:44,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:45,293 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834641063] [2023-12-02 13:37:45,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834641063] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:45,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [155214248] [2023-12-02 13:37:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:45,294 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:37:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:37:45,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:37:45,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-12-02 13:37:45,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:45,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:37:45,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:45,478 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:45,485 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:45,550 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:45,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:45,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:37:45,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:37:45,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:37:45,709 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:45,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:37:45,714 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [155214248] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365531536] [2023-12-02 13:37:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:47,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:47,985 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:47,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:37:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:48,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:37:48,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:48,097 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:48,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:37:48,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:37:48,201 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:48,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:48,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:37:48,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:37:48,314 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:48,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:37:48,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:48,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365531536] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:37:48,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:37:48,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 10 [2023-12-02 13:37:48,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817986959] [2023-12-02 13:37:48,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:37:48,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:37:48,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:48,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:37:48,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=105, Unknown=1, NotChecked=20, Total=156 [2023-12-02 13:37:48,630 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:49,336 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2023-12-02 13:37:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:37:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-02 13:37:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:49,338 INFO L225 Difference]: With dead ends: 70 [2023-12-02 13:37:49,338 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 13:37:49,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-12-02 13:37:49,339 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 23 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:49,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 156 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 172 Invalid, 0 Unknown, 66 Unchecked, 0.5s Time] [2023-12-02 13:37:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 13:37:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-12-02 13:37:49,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 63 states have internal predecessors, (74), 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) [2023-12-02 13:37:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2023-12-02 13:37:49,342 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 15 [2023-12-02 13:37:49,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:49,343 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2023-12-02 13:37:49,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:37:49,343 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2023-12-02 13:37:49,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:37:49,344 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:49,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:49,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2023-12-02 13:37:49,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 13:37:49,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 13:37:49,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:49,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:49,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:49,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1257742689, now seen corresponding path program 1 times [2023-12-02 13:37:49,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:49,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [39712300] [2023-12-02 13:37:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:49,946 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:49,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:49,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:49,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-12-02 13:37:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:50,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:37:50,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:50,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:50,083 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [39712300] [2023-12-02 13:37:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [39712300] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:50,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:50,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:37:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203126551] [2023-12-02 13:37:50,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:50,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:37:50,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:50,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:37:50,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:37:50,085 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:50,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:50,315 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2023-12-02 13:37:50,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:37:50,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 13:37:50,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:50,316 INFO L225 Difference]: With dead ends: 74 [2023-12-02 13:37:50,316 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 13:37:50,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:37:50,317 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:50,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 245 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:37:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 13:37:50,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2023-12-02 13:37:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 64 states have internal predecessors, (73), 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) [2023-12-02 13:37:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2023-12-02 13:37:50,321 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 15 [2023-12-02 13:37:50,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:50,321 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2023-12-02 13:37:50,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:37:50,321 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2023-12-02 13:37:50,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:37:50,322 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:50,322 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:50,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2023-12-02 13:37:50,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:50,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:50,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:50,523 INFO L85 PathProgramCache]: Analyzing trace with hash -331815379, now seen corresponding path program 1 times [2023-12-02 13:37:50,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:50,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [356567830] [2023-12-02 13:37:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:50,524 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:50,525 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:50,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 13:37:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:50,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 13:37:50,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:50,660 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:50,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:50,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:50,802 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:50,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:50,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:37:50,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:37:50,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 13:37:50,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 13:37:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:51,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:51,473 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_create_~now~0#1.offset| (_ bv8 64)))) (and (forall ((v_ArrVal_302 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_305 (_ BitVec 64))) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_302))) (store .cse0 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1 v_ArrVal_305))) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) (_ bv0 64))) (forall ((v_ArrVal_301 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_301))) (store .cse2 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1 |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))))) is different from false [2023-12-02 13:37:54,020 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:37:54,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 13:37:54,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-02 13:37:54,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 13:37:54,039 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 13:37:54,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 13:37:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:54,073 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:54,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [356567830] [2023-12-02 13:37:54,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [356567830] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604145604] [2023-12-02 13:37:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:54,074 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:37:54,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:37:54,075 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:37:54,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 13:37:54,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:54,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 13:37:54,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:54,278 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:54,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:54,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:54,357 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:54,358 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:54,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:37:54,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:37:54,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 13:37:54,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 13:37:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:54,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:55,022 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_create_~now~0#1.offset| (_ bv8 64)))) (and (forall ((v_ArrVal_337 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_305 (_ BitVec 64))) (= (_ bv0 64) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_337))) (store .cse0 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1 v_ArrVal_305))) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (forall ((v_ArrVal_338 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_338))) (store .cse2 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1 |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))))) is different from false [2023-12-02 13:37:55,077 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_create_~data~0#1.base_20| (_ BitVec 64))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_~data~0#1.base_20|))) (forall ((v_ArrVal_337 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_create_~data~0#1.base_20| v_ArrVal_337) |c_ULTIMATE.start_create_#t~ret4#1.base|) |c_ULTIMATE.start_create_#t~ret4#1.offset|))))) (forall ((|v_ULTIMATE.start_create_~data~0#1.base_20| (_ BitVec 64))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_create_~data~0#1.base_20|))) (forall ((v_ArrVal_338 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_create_~data~0#1.base_20| v_ArrVal_338) |c_ULTIMATE.start_create_#t~ret4#1.base|) |c_ULTIMATE.start_create_#t~ret4#1.offset|)))))) is different from false [2023-12-02 13:37:55,506 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:37:55,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-12-02 13:37:55,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-12-02 13:37:55,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 13:37:55,526 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 13:37:55,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 13:37:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:55,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1604145604] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:55,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990981893] [2023-12-02 13:37:55,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:55,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:37:55,529 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:37:55,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 13:37:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:55,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 13:37:55,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:55,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:55,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:55,882 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:37:55,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:37:55,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:37:56,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-12-02 13:37:56,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 13:37:56,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-02 13:37:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:56,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:37:56,490 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (bvadd |c_ULTIMATE.start_create_~now~0#1.offset| (_ bv8 64)))) (and (forall ((v_ArrVal_373 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_305 (_ BitVec 64))) (= (_ bv0 64) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_373))) (store .cse0 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse0 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1 v_ArrVal_305))) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (forall ((v_ArrVal_372 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 64) (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_372))) (store .cse2 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) .cse1 |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))))) is different from false [2023-12-02 13:37:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:37:56,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990981893] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:37:56,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:37:56,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10, 10, 9, 9] total 26 [2023-12-02 13:37:56,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475413391] [2023-12-02 13:37:56,886 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:37:56,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 13:37:56,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:56,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 13:37:56,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=393, Unknown=7, NotChecked=172, Total=650 [2023-12-02 13:37:56,887 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 26 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:37:58,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:58,184 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2023-12-02 13:37:58,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:37:58,185 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2023-12-02 13:37:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:58,186 INFO L225 Difference]: With dead ends: 70 [2023-12-02 13:37:58,186 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 13:37:58,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=95, Invalid=466, Unknown=7, NotChecked=188, Total=756 [2023-12-02 13:37:58,187 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:58,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 455 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 227 Invalid, 0 Unknown, 127 Unchecked, 0.8s Time] [2023-12-02 13:37:58,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 13:37:58,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-02 13:37:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.608695652173913) internal successors, (74), 65 states have internal predecessors, (74), 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) [2023-12-02 13:37:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2023-12-02 13:37:58,192 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 16 [2023-12-02 13:37:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:58,192 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2023-12-02 13:37:58,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 3 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 13:37:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2023-12-02 13:37:58,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:37:58,193 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:58,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:58,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 13:37:58,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 13:37:58,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 13:37:58,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:37:58,794 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:58,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:58,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422936, now seen corresponding path program 1 times [2023-12-02 13:37:58,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:58,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822279974] [2023-12-02 13:37:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:58,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:58,797 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:58,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 13:37:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:58,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:37:58,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:58,911 INFO L378 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 6 treesize of output 7 [2023-12-02 13:37:58,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-12-02 13:37:58,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 13:37:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:58,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:59,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:59,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822279974] [2023-12-02 13:37:59,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822279974] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:59,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:59,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:37:59,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857408788] [2023-12-02 13:37:59,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:59,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:37:59,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:59,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:37:59,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:37:59,002 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:59,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:37:59,459 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-12-02 13:37:59,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:37:59,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 13:37:59,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:37:59,461 INFO L225 Difference]: With dead ends: 69 [2023-12-02 13:37:59,461 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 13:37:59,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:37:59,461 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:37:59,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 173 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:37:59,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 13:37:59,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 13:37:59,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.565217391304348) internal successors, (72), 64 states have internal predecessors, (72), 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) [2023-12-02 13:37:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2023-12-02 13:37:59,466 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 17 [2023-12-02 13:37:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:37:59,466 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2023-12-02 13:37:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:37:59,467 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2023-12-02 13:37:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:37:59,467 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:37:59,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:37:59,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-12-02 13:37:59,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:59,668 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:37:59,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:37:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422935, now seen corresponding path program 1 times [2023-12-02 13:37:59,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:37:59,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1882661249] [2023-12-02 13:37:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:37:59,669 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:37:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:37:59,670 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:37:59,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-12-02 13:37:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:37:59,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:37:59,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:37:59,788 INFO L378 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 6 treesize of output 5 [2023-12-02 13:37:59,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2023-12-02 13:37:59,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:37:59,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 13:37:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:37:59,925 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:37:59,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:37:59,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1882661249] [2023-12-02 13:37:59,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1882661249] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:37:59,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:37:59,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:37:59,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242668588] [2023-12-02 13:37:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:37:59,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:37:59,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:37:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:37:59,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:37:59,927 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:38:00,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:00,507 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2023-12-02 13:38:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:38:00,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-12-02 13:38:00,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:00,508 INFO L225 Difference]: With dead ends: 68 [2023-12-02 13:38:00,508 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 13:38:00,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:38:00,509 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:00,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 189 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:38:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 13:38:00,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-12-02 13:38:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 63 states have internal predecessors, (70), 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) [2023-12-02 13:38:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2023-12-02 13:38:00,512 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 17 [2023-12-02 13:38:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:00,512 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2023-12-02 13:38:00,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:38:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2023-12-02 13:38:00,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:38:00,513 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:00,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:00,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-12-02 13:38:00,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:00,714 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:00,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1047044963, now seen corresponding path program 1 times [2023-12-02 13:38:00,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:00,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174622344] [2023-12-02 13:38:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:00,715 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:00,716 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:00,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-12-02 13:38:00,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:00,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 13:38:00,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:00,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:00,879 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:00,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174622344] [2023-12-02 13:38:00,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174622344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:00,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:00,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:38:00,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854877528] [2023-12-02 13:38:00,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:00,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:38:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:00,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:38:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:38:00,881 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:01,550 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2023-12-02 13:38:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:38:01,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 13:38:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:01,552 INFO L225 Difference]: With dead ends: 95 [2023-12-02 13:38:01,552 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 13:38:01,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:38:01,553 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:01,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 104 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:38:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 13:38:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 75. [2023-12-02 13:38:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.5740740740740742) internal successors, (85), 70 states have internal predecessors, (85), 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) [2023-12-02 13:38:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2023-12-02 13:38:01,556 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 18 [2023-12-02 13:38:01,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:01,556 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2023-12-02 13:38:01,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:01,557 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2023-12-02 13:38:01,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 13:38:01,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:01,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:01,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-12-02 13:38:01,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:01,758 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:01,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:01,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1047044962, now seen corresponding path program 1 times [2023-12-02 13:38:01,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:01,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418249731] [2023-12-02 13:38:01,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:01,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:01,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:01,760 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:01,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 13:38:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:01,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 13:38:01,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:02,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:02,102 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:02,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418249731] [2023-12-02 13:38:02,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418249731] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:02,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:02,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:38:02,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054339338] [2023-12-02 13:38:02,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:02,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:38:02,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:38:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:38:02,104 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:02,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:02,884 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2023-12-02 13:38:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:38:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 13:38:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:02,886 INFO L225 Difference]: With dead ends: 106 [2023-12-02 13:38:02,886 INFO L226 Difference]: Without dead ends: 106 [2023-12-02 13:38:02,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:38:02,887 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 55 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:02,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 199 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 13:38:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-12-02 13:38:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2023-12-02 13:38:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.5846153846153845) internal successors, (103), 81 states have internal predecessors, (103), 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) [2023-12-02 13:38:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2023-12-02 13:38:02,891 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 18 [2023-12-02 13:38:02,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:02,892 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2023-12-02 13:38:02,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2023-12-02 13:38:02,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:38:02,893 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:02,893 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:02,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:03,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:03,097 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:03,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1901344563, now seen corresponding path program 1 times [2023-12-02 13:38:03,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:03,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1497804346] [2023-12-02 13:38:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:03,098 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:03,099 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:03,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-12-02 13:38:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:03,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 13:38:03,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:03,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-12-02 13:38:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:03,402 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:03,402 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1497804346] [2023-12-02 13:38:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1497804346] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:03,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:38:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253393743] [2023-12-02 13:38:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:38:03,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:03,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:38:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:38:03,404 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:04,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:04,105 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2023-12-02 13:38:04,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:38:04,106 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 13:38:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:04,107 INFO L225 Difference]: With dead ends: 105 [2023-12-02 13:38:04,107 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 13:38:04,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:38:04,107 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:04,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 164 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:38:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 13:38:04,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2023-12-02 13:38:04,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 81 states have internal predecessors, (102), 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) [2023-12-02 13:38:04,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2023-12-02 13:38:04,110 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 19 [2023-12-02 13:38:04,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:04,111 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2023-12-02 13:38:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:04,111 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2023-12-02 13:38:04,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:38:04,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:04,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:04,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-12-02 13:38:04,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:04,312 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:04,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1187515612, now seen corresponding path program 1 times [2023-12-02 13:38:04,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:04,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169175524] [2023-12-02 13:38:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:04,313 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:04,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:04,314 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:04,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-12-02 13:38:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:04,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 13:38:04,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:04,513 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:04,513 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169175524] [2023-12-02 13:38:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1169175524] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:04,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:04,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:38:04,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518865121] [2023-12-02 13:38:04,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:04,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:38:04,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:04,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:38:04,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:38:04,515 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:04,922 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2023-12-02 13:38:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:38:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 13:38:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:04,924 INFO L225 Difference]: With dead ends: 91 [2023-12-02 13:38:04,924 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 13:38:04,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:38:04,925 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:04,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 184 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:38:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 13:38:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2023-12-02 13:38:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 78 states have internal predecessors, (92), 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) [2023-12-02 13:38:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2023-12-02 13:38:04,929 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 20 [2023-12-02 13:38:04,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:04,929 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2023-12-02 13:38:04,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2023-12-02 13:38:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:38:04,930 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:04,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:04,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-12-02 13:38:05,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:05,130 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:05,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1187860579, now seen corresponding path program 1 times [2023-12-02 13:38:05,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1483060636] [2023-12-02 13:38:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:05,131 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:05,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:05,132 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:05,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 13:38:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:05,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:38:05,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:05,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-12-02 13:38:05,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-12-02 13:38:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:05,912 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:05,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:05,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1483060636] [2023-12-02 13:38:05,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1483060636] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:05,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:05,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:38:05,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296397579] [2023-12-02 13:38:05,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:38:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:05,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:38:05,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:38:05,913 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:07,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:07,757 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2023-12-02 13:38:07,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:38:07,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 13:38:07,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:07,759 INFO L225 Difference]: With dead ends: 101 [2023-12-02 13:38:07,759 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 13:38:07,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:38:07,760 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:07,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 123 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 13:38:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 13:38:07,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2023-12-02 13:38:07,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.467741935483871) internal successors, (91), 78 states have internal predecessors, (91), 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) [2023-12-02 13:38:07,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2023-12-02 13:38:07,763 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 20 [2023-12-02 13:38:07,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:07,763 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2023-12-02 13:38:07,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:07,763 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2023-12-02 13:38:07,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:38:07,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:07,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:07,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 13:38:07,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:07,964 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:07,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:07,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1831027829, now seen corresponding path program 1 times [2023-12-02 13:38:07,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:07,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [95969604] [2023-12-02 13:38:07,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:07,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:07,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:07,966 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:07,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-12-02 13:38:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:08,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:38:08,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:08,088 INFO L378 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 6 treesize of output 7 [2023-12-02 13:38:08,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-12-02 13:38:08,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 13:38:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:08,287 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:08,287 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [95969604] [2023-12-02 13:38:08,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [95969604] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:08,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:08,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:38:08,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442774643] [2023-12-02 13:38:08,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:08,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:38:08,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:08,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:38:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:38:08,289 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:09,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:09,040 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2023-12-02 13:38:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:38:09,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-12-02 13:38:09,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:09,042 INFO L225 Difference]: With dead ends: 83 [2023-12-02 13:38:09,042 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 13:38:09,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:38:09,042 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 13 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:09,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 148 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:38:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 13:38:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 13:38:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.4516129032258065) internal successors, (90), 78 states have internal predecessors, (90), 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) [2023-12-02 13:38:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2023-12-02 13:38:09,047 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2023-12-02 13:38:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:09,047 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2023-12-02 13:38:09,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:09,047 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2023-12-02 13:38:09,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:38:09,048 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:09,048 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:09,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-12-02 13:38:09,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:09,249 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:09,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1859673922, now seen corresponding path program 1 times [2023-12-02 13:38:09,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:09,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050058440] [2023-12-02 13:38:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:09,250 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:09,250 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:09,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-12-02 13:38:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:09,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 13:38:09,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:09,478 INFO L378 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 6 treesize of output 7 [2023-12-02 13:38:09,487 INFO L378 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 6 treesize of output 5 [2023-12-02 13:38:09,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:09,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:09,590 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:09,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:09,734 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) (_ bv0 1)) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:38:09,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:09,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:09,775 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:09,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:38:09,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:12,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050058440] [2023-12-02 13:38:12,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050058440] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:12,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624153857] [2023-12-02 13:38:12,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:12,584 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:12,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:38:12,585 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:38:12,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 13:38:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:12,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 13:38:12,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:12,884 INFO L378 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 6 treesize of output 5 [2023-12-02 13:38:12,890 INFO L378 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 6 treesize of output 7 [2023-12-02 13:38:12,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:12,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:12,950 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:12,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:13,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:13,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:13,048 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:13,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:38:13,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624153857] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091598214] [2023-12-02 13:38:13,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:13,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:13,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:13,622 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:13,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 13:38:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:13,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 13:38:13,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:14,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:14,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:14,164 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:14,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:38:14,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:16,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091598214] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:16,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:38:16,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-12-02 13:38:16,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028331409] [2023-12-02 13:38:16,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:16,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:38:16,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:16,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:38:16,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=323, Unknown=2, NotChecked=36, Total=420 [2023-12-02 13:38:16,929 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:38:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:18,236 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2023-12-02 13:38:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:38:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-12-02 13:38:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:18,237 INFO L225 Difference]: With dead ends: 101 [2023-12-02 13:38:18,237 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 13:38:18,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=88, Invalid=466, Unknown=2, NotChecked=44, Total=600 [2023-12-02 13:38:18,238 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:18,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 349 Invalid, 0 Unknown, 84 Unchecked, 1.0s Time] [2023-12-02 13:38:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 13:38:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2023-12-02 13:38:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.452054794520548) internal successors, (106), 89 states have internal predecessors, (106), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2023-12-02 13:38:18,242 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 23 [2023-12-02 13:38:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:18,242 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2023-12-02 13:38:18,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:38:18,242 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2023-12-02 13:38:18,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:38:18,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:18,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:18,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:18,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Ended with exit code 0 [2023-12-02 13:38:18,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 13:38:18,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:18,843 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:18,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:18,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1318843688, now seen corresponding path program 1 times [2023-12-02 13:38:18,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:18,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1351633405] [2023-12-02 13:38:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:18,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:18,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:18,845 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:18,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 13:38:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:18,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 13:38:18,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:18,981 INFO L378 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 6 treesize of output 7 [2023-12-02 13:38:19,031 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:19,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:19,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 13:38:19,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2023-12-02 13:38:19,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 13:38:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:19,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:19,374 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:19,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1351633405] [2023-12-02 13:38:19,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1351633405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:19,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:19,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:38:19,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28199640] [2023-12-02 13:38:19,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:19,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:38:19,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:38:19,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:38:19,376 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:20,504 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-12-02 13:38:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:38:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-12-02 13:38:20,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:20,506 INFO L225 Difference]: With dead ends: 98 [2023-12-02 13:38:20,506 INFO L226 Difference]: Without dead ends: 98 [2023-12-02 13:38:20,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:38:20,506 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:20,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 178 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 13:38:20,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-02 13:38:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2023-12-02 13:38:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 89 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2023-12-02 13:38:20,510 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 23 [2023-12-02 13:38:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:20,510 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2023-12-02 13:38:20,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:20,510 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2023-12-02 13:38:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:38:20,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:20,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:20,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:20,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:20,711 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:20,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:20,711 INFO L85 PathProgramCache]: Analyzing trace with hash -394812818, now seen corresponding path program 1 times [2023-12-02 13:38:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:20,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221126501] [2023-12-02 13:38:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:20,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:20,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:20,713 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:20,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-12-02 13:38:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:20,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:38:20,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:21,024 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 13:38:21,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 13:38:21,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:21,189 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:21,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 13:38:21,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:38:21,286 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (= (store |c_old(#valid)| alloc_and_zero_~pi~0.base (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 13:38:21,340 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-12-02 13:38:21,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 32 [2023-12-02 13:38:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 13:38:21,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:23,613 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_824 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_824) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 13:38:23,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:23,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 13:38:23,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-12-02 13:38:23,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 13:38:25,820 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221126501] [2023-12-02 13:38:25,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221126501] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:25,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [973326413] [2023-12-02 13:38:25,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:25,820 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:25,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:38:25,821 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:38:25,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 13:38:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:26,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:38:26,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:26,130 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 13:38:26,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 13:38:26,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:26,198 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:26,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 13:38:26,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:38:26,407 INFO L349 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-12-02 13:38:26,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2023-12-02 13:38:26,420 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:26,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:26,567 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_882 (Array (_ BitVec 64) (_ BitVec 64)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_882) |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 13:38:28,648 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:28,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 13:38:28,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-12-02 13:38:28,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 13:38:28,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [973326413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255658466] [2023-12-02 13:38:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:28,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:28,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:28,762 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:28,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 13:38:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:28,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 13:38:28,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:29,012 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:29,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:29,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:31,242 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:31,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 13:38:31,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:38:31,322 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 13:38:31,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 13:38:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:31,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:33,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:33,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 13:38:33,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-12-02 13:38:33,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 13:38:33,676 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-12-02 13:38:33,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 13:38:33,835 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-12-02 13:38:33,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 13:38:33,914 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:38:33,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255658466] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:38:33,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2023-12-02 13:38:33,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9, 9] total 22 [2023-12-02 13:38:33,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659446610] [2023-12-02 13:38:33,915 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:33,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:38:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:33,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:38:33,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=420, Unknown=9, NotChecked=132, Total=650 [2023-12-02 13:38:33,917 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 23 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 13:38:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:34,825 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2023-12-02 13:38:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:38:34,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) Word has length 25 [2023-12-02 13:38:34,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:34,826 INFO L225 Difference]: With dead ends: 94 [2023-12-02 13:38:34,826 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 13:38:34,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 18 SemanticMatches, 25 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=98, Invalid=457, Unknown=9, NotChecked=138, Total=702 [2023-12-02 13:38:34,827 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:34,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 295 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 257 Invalid, 0 Unknown, 91 Unchecked, 0.8s Time] [2023-12-02 13:38:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 13:38:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-12-02 13:38:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 1.4109589041095891) internal successors, (103), 88 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:34,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-12-02 13:38:34,831 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 25 [2023-12-02 13:38:34,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:34,831 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-12-02 13:38:34,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 6 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 13:38:34,831 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-12-02 13:38:34,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:38:34,832 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:34,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:34,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:35,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2023-12-02 13:38:35,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 13:38:35,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:35,433 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:35,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:35,433 INFO L85 PathProgramCache]: Analyzing trace with hash -394812817, now seen corresponding path program 1 times [2023-12-02 13:38:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:35,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50622745] [2023-12-02 13:38:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:35,434 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:35,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:35,435 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:35,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 13:38:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:35,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 13:38:35,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:35,706 INFO L378 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 6 treesize of output 5 [2023-12-02 13:38:35,801 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:35,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:35,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:38:35,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:36,006 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:36,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 13:38:36,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:38:36,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:38:36,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:38:36,140 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (= |c_#length| (store |c_old(#length)| alloc_and_zero_~pi~0.base (_ bv16 64)))) is different from true [2023-12-02 13:38:36,171 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 13:38:36,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 13:38:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:38:36,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:36,841 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50622745] [2023-12-02 13:38:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50622745] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [799134138] [2023-12-02 13:38:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:36,841 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:36,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:38:36,842 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:38:36,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 13:38:37,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:37,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 13:38:37,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:37,231 INFO L378 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 6 treesize of output 5 [2023-12-02 13:38:37,436 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 13:38:37,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 13:38:37,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:37,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:38:37,829 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:37,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2023-12-02 13:38:37,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:38:37,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2023-12-02 13:38:37,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:38:38,101 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base (_ BitVec 64))) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) (_ bv0 1)) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:38:38,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:38,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:38,173 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-12-02 13:38:38,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 13:38:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:38:38,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:38,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [799134138] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:38,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968269031] [2023-12-02 13:38:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:38,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:38,739 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:38,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 13:38:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:38,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 13:38:38,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:38,919 INFO L378 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 6 treesize of output 5 [2023-12-02 13:38:39,045 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:39,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:39,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:38:39,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:39,453 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:39,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2023-12-02 13:38:39,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:38:39,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2023-12-02 13:38:39,505 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:38:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:38:39,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 13:38:39,658 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:39,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:38:39,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:40,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968269031] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:40,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:38:40,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 24 [2023-12-02 13:38:40,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639588889] [2023-12-02 13:38:40,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:40,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 13:38:40,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:40,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 13:38:40,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=564, Unknown=2, NotChecked=98, Total=756 [2023-12-02 13:38:40,145 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 25 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 13:38:42,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:42,217 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-12-02 13:38:42,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:38:42,218 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 25 [2023-12-02 13:38:42,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:42,219 INFO L225 Difference]: With dead ends: 91 [2023-12-02 13:38:42,219 INFO L226 Difference]: Without dead ends: 91 [2023-12-02 13:38:42,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=144, Invalid=791, Unknown=3, NotChecked=118, Total=1056 [2023-12-02 13:38:42,220 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:42,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 398 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 430 Invalid, 0 Unknown, 112 Unchecked, 1.6s Time] [2023-12-02 13:38:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-02 13:38:42,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2023-12-02 13:38:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 85 states have internal predecessors, (97), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:42,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2023-12-02 13:38:42,223 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 25 [2023-12-02 13:38:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:42,223 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2023-12-02 13:38:42,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 13:38:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2023-12-02 13:38:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:38:42,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:42,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:42,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2023-12-02 13:38:42,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-12-02 13:38:42,631 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-12-02 13:38:42,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:42,825 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:42,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:42,825 INFO L85 PathProgramCache]: Analyzing trace with hash -393404590, now seen corresponding path program 1 times [2023-12-02 13:38:42,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1046707324] [2023-12-02 13:38:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:42,826 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:42,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:42,827 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:42,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-12-02 13:38:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:42,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 13:38:42,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:38:43,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:38:43,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:43,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1046707324] [2023-12-02 13:38:43,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1046707324] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:38:43,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:38:43,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:38:43,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118618097] [2023-12-02 13:38:43,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:38:43,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 13:38:43,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:43,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 13:38:43,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:38:43,313 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:44,028 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2023-12-02 13:38:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:38:44,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-12-02 13:38:44,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:44,030 INFO L225 Difference]: With dead ends: 98 [2023-12-02 13:38:44,030 INFO L226 Difference]: Without dead ends: 98 [2023-12-02 13:38:44,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:38:44,031 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:44,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 126 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 13:38:44,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-02 13:38:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2023-12-02 13:38:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 76 states have (on average 1.355263157894737) internal successors, (103), 88 states have internal predecessors, (103), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-12-02 13:38:44,034 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 25 [2023-12-02 13:38:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:44,034 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-12-02 13:38:44,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:38:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-12-02 13:38:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:38:44,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:44,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:44,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2023-12-02 13:38:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:44,235 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:44,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -760601761, now seen corresponding path program 1 times [2023-12-02 13:38:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917682850] [2023-12-02 13:38:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:44,236 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:44,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:44,237 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:44,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-12-02 13:38:44,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:44,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 13:38:44,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:44,646 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 13:38:44,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 13:38:44,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:44,886 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:44,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 13:38:45,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:38:45,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:38:45,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:47,419 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1195 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1195) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 13:38:47,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:47,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 13:38:47,451 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:47,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-12-02 13:38:47,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 13:38:47,996 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:38:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917682850] [2023-12-02 13:38:47,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917682850] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:47,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [207674681] [2023-12-02 13:38:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:47,996 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:47,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:38:47,997 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:38:47,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2023-12-02 13:38:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:48,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:38:48,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:48,766 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 13:38:48,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 13:38:48,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:49,220 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:49,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 13:38:49,576 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:38:49,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:38:49,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:49,711 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1243 (Array (_ BitVec 64) (_ BitVec 64)))) (= (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1243) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 13:38:51,924 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:51,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 13:38:51,948 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:51,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-12-02 13:38:51,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 13:38:52,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [207674681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:52,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83994934] [2023-12-02 13:38:52,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:52,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:38:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:38:52,605 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:38:52,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 13:38:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:52,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:38:52,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:53,047 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:53,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:53,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:53,470 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:53,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 13:38:53,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:38:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:38:53,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:38:53,804 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1289) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 13:38:53,819 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1289 (Array (_ BitVec 64) (_ BitVec 64)))) (= (_ bv0 1) (bvadd (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1289) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 13:38:53,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:53,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-12-02 13:38:53,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:53,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 41 [2023-12-02 13:38:53,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-12-02 13:38:54,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:38:54,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 99 [2023-12-02 13:38:56,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83994934] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:38:56,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:38:56,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 30 [2023-12-02 13:38:56,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608128532] [2023-12-02 13:38:56,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:38:56,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 13:38:56,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:38:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 13:38:56,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1239, Unknown=15, NotChecked=300, Total=1722 [2023-12-02 13:38:56,502 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:38:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:38:58,584 INFO L93 Difference]: Finished difference Result 100 states and 118 transitions. [2023-12-02 13:38:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:38:58,585 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 26 [2023-12-02 13:38:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:38:58,586 INFO L225 Difference]: With dead ends: 100 [2023-12-02 13:38:58,586 INFO L226 Difference]: Without dead ends: 100 [2023-12-02 13:38:58,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=202, Invalid=1439, Unknown=15, NotChecked=324, Total=1980 [2023-12-02 13:38:58,587 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:38:58,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 542 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 13:38:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-12-02 13:38:58,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2023-12-02 13:38:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.3717948717948718) internal successors, (107), 90 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:38:58,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2023-12-02 13:38:58,591 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 26 [2023-12-02 13:38:58,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:38:58,591 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2023-12-02 13:38:58,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:38:58,591 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2023-12-02 13:38:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:38:58,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:38:58,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:38:58,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Ended with exit code 0 [2023-12-02 13:38:58,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 13:38:58,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2023-12-02 13:38:59,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:38:59,193 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:38:59,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:38:59,193 INFO L85 PathProgramCache]: Analyzing trace with hash -760601760, now seen corresponding path program 1 times [2023-12-02 13:38:59,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:38:59,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744981244] [2023-12-02 13:38:59,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:38:59,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:38:59,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:38:59,194 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:38:59,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2023-12-02 13:38:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:38:59,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 13:38:59,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:38:59,529 INFO L378 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 6 treesize of output 5 [2023-12-02 13:38:59,622 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:38:59,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:38:59,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:38:59,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:38:59,890 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:38:59,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 13:38:59,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:39:00,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:39:00,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:39:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:00,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:00,937 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1337 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv16 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1338) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1337) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1338) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (bvule (bvadd (_ bv8 64) .cse0) (bvadd (_ bv16 64) .cse0))))) is different from false [2023-12-02 13:39:01,019 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1338) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (bvule (bvadd (_ bv8 64) .cse0) (bvadd .cse0 (_ bv16 64))))) (forall ((v_ArrVal_1338 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1337 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1338) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) (_ bv16 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1337) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))))) is different from false [2023-12-02 13:39:01,048 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:01,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 13:39:01,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:01,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-12-02 13:39:01,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 13:39:01,198 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:01,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 13:39:01,222 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:01,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 13:39:01,227 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:39:01,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 13:39:01,238 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:39:01,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 13:39:01,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:39:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744981244] [2023-12-02 13:39:01,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744981244] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:01,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [416069341] [2023-12-02 13:39:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:01,778 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:39:01,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:39:01,779 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:39:01,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2023-12-02 13:39:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:02,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-02 13:39:02,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:02,656 INFO L378 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 6 treesize of output 5 [2023-12-02 13:39:02,736 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:39:02,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:39:02,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:39:02,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:39:03,246 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:39:03,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 13:39:03,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:39:03,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:39:03,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:39:03,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:03,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:03,900 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1388 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1387 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1388) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) (_ bv16 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1387) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) (forall ((v_ArrVal_1388 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1388) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (bvule (bvadd .cse0 (_ bv8 64)) (bvadd .cse0 (_ bv16 64)))))) is different from false [2023-12-02 13:39:04,005 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_1388 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1388) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (bvule (bvadd (_ bv8 64) .cse0) (bvadd .cse0 (_ bv16 64))))) (forall ((v_ArrVal_1388 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1387 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1388) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) (_ bv16 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1387) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))))) is different from false [2023-12-02 13:39:04,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:04,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 13:39:04,107 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:04,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-12-02 13:39:04,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 13:39:04,254 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:04,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 13:39:04,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:04,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 13:39:04,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:39:04,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 13:39:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:39:04,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 13:39:04,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [416069341] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:04,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208365349] [2023-12-02 13:39:04,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:04,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:04,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:04,554 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:04,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 13:39:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:04,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:39:04,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:04,783 INFO L378 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 6 treesize of output 5 [2023-12-02 13:39:04,844 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:39:04,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:39:04,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:39:04,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:39:04,977 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:39:04,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-12-02 13:39:04,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-12-02 13:39:05,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:39:05,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 13:39:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:05,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:05,396 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1438 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1438) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (bvule (bvadd (_ bv8 64) .cse0) (bvadd (_ bv16 64) .cse0)))) (forall ((v_ArrVal_1437 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1438 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (_ bv16 64) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1438) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1437) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))))) is different from false [2023-12-02 13:39:05,478 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (forall ((v_ArrVal_1438 (Array (_ BitVec 64) (_ BitVec 64)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1438) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|))) (bvule (bvadd (_ bv8 64) .cse0) (bvadd .cse0 (_ bv16 64))))) (forall ((v_ArrVal_1437 (Array (_ BitVec 64) (_ BitVec 64))) (v_ArrVal_1438 (Array (_ BitVec 64) (_ BitVec 64)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1438) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) (_ bv16 64)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1437) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))))) is different from false [2023-12-02 13:39:05,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:05,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-12-02 13:39:05,600 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:05,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-12-02 13:39:05,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 13:39:05,728 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:05,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-12-02 13:39:05,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:05,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-12-02 13:39:05,760 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:39:05,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2023-12-02 13:39:05,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:39:05,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 13:39:06,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208365349] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:06,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:39:06,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 22 [2023-12-02 13:39:06,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960829921] [2023-12-02 13:39:06,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:06,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:39:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:39:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:39:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=671, Unknown=6, NotChecked=342, Total=1122 [2023-12-02 13:39:06,047 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 23 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:39:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:07,471 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-12-02 13:39:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:39:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-12-02 13:39:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:07,472 INFO L225 Difference]: With dead ends: 98 [2023-12-02 13:39:07,472 INFO L226 Difference]: Without dead ends: 98 [2023-12-02 13:39:07,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=136, Invalid=812, Unknown=6, NotChecked=378, Total=1332 [2023-12-02 13:39:07,473 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:07,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 459 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 13:39:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-12-02 13:39:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2023-12-02 13:39:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 91 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:39:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 115 transitions. [2023-12-02 13:39:07,476 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 115 transitions. Word has length 26 [2023-12-02 13:39:07,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:07,476 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 115 transitions. [2023-12-02 13:39:07,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.95) internal successors, (39), 19 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:39:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 115 transitions. [2023-12-02 13:39:07,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:39:07,477 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:07,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:07,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2023-12-02 13:39:07,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Ended with exit code 0 [2023-12-02 13:39:07,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 13:39:08,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:08,078 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:39:08,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:08,078 INFO L85 PathProgramCache]: Analyzing trace with hash -793897648, now seen corresponding path program 1 times [2023-12-02 13:39:08,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:39:08,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1197156467] [2023-12-02 13:39:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:08,079 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:39:08,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:39:08,079 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:39:08,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-12-02 13:39:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:08,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 13:39:08,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:08,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:39:08,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:08,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:08,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 13:39:10,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:39:10,147 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:39:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1197156467] [2023-12-02 13:39:10,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1197156467] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:10,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018206473] [2023-12-02 13:39:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:10,148 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:39:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:39:10,149 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:39:10,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2023-12-02 13:39:10,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:10,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:39:10,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:10,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:39:10,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:10,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:10,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 13:39:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:39:11,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2018206473] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:11,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312854945] [2023-12-02 13:39:11,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:11,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:11,075 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:11,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 13:39:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:11,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 13:39:11,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:39:11,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:11,452 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:11,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 13:39:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:39:11,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312854945] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:11,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:39:11,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2023-12-02 13:39:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757206227] [2023-12-02 13:39:11,779 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:11,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:39:11,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:39:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:39:11,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:39:11,781 INFO L87 Difference]: Start difference. First operand 97 states and 115 transitions. Second operand has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:39:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:14,499 INFO L93 Difference]: Finished difference Result 102 states and 116 transitions. [2023-12-02 13:39:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:39:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-12-02 13:39:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:14,501 INFO L225 Difference]: With dead ends: 102 [2023-12-02 13:39:14,501 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 13:39:14,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-12-02 13:39:14,502 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:14,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 265 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 13:39:14,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 13:39:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-12-02 13:39:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 90 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:39:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2023-12-02 13:39:14,505 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 28 [2023-12-02 13:39:14,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:14,505 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2023-12-02 13:39:14,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:39:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2023-12-02 13:39:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:39:14,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:14,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:14,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 13:39:14,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-12-02 13:39:14,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:15,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:39:15,107 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:39:15,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:15,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1049743832, now seen corresponding path program 1 times [2023-12-02 13:39:15,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:39:15,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353764997] [2023-12-02 13:39:15,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:15,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:39:15,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:39:15,109 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:39:15,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2023-12-02 13:39:15,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:15,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 13:39:15,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:15,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:15,744 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-12-02 13:39:15,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-12-02 13:39:15,763 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-12-02 13:39:15,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 12 [2023-12-02 13:39:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:15,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:39:15,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353764997] [2023-12-02 13:39:15,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353764997] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:15,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [153969771] [2023-12-02 13:39:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:15,793 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:39:15,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:39:15,794 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:39:15,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2023-12-02 13:39:16,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:16,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:39:16,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:16,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-12-02 13:39:16,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 1 [2023-12-02 13:39:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:16,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:16,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [153969771] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:16,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661825142] [2023-12-02 13:39:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:16,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:16,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:16,887 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:16,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 13:39:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:17,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 13:39:17,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:17,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-12-02 13:39:17,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 [2023-12-02 13:39:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:17,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:17,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661825142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:39:17,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 13:39:17,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 13, 8, 9, 8] total 20 [2023-12-02 13:39:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999810015] [2023-12-02 13:39:17,415 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:17,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 13:39:17,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:39:17,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 13:39:17,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2023-12-02 13:39:17,417 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:39:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:18,964 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2023-12-02 13:39:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 13:39:18,965 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-12-02 13:39:18,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:18,966 INFO L225 Difference]: With dead ends: 127 [2023-12-02 13:39:18,966 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 13:39:18,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2023-12-02 13:39:18,967 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 101 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:18,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 269 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 13:39:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 13:39:18,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2023-12-02 13:39:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 106 states have internal predecessors, (127), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:39:18,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2023-12-02 13:39:18,974 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 28 [2023-12-02 13:39:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:18,974 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2023-12-02 13:39:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:39:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2023-12-02 13:39:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:39:18,975 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:18,975 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:18,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 13:39:19,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:19,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:19,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:39:19,576 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:39:19,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1158976705, now seen corresponding path program 1 times [2023-12-02 13:39:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:39:19,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785453741] [2023-12-02 13:39:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:19,577 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:39:19,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:39:19,578 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:39:19,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2023-12-02 13:39:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:19,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:39:19,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:19,977 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:39:19,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:39:20,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:39:20,192 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:39:20,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-12-02 13:39:20,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 13:39:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:20,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:20,484 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1688 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1688) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) is different from false [2023-12-02 13:39:20,596 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:20,596 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 13:39:20,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:20,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-12-02 13:39:20,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-02 13:39:22,842 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 13:39:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785453741] [2023-12-02 13:39:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785453741] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1384121149] [2023-12-02 13:39:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:22,843 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 13:39:22,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 13:39:22,844 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 13:39:22,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2023-12-02 13:39:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:23,236 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 13:39:23,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:23,645 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:39:23,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:39:23,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:39:23,991 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:39:23,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-12-02 13:39:24,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 13:39:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:24,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:24,252 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1733 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1733) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) is different from false [2023-12-02 13:39:24,266 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1733 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1733) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) is different from false [2023-12-02 13:39:24,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:24,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 13:39:24,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:24,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-12-02 13:39:24,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-02 13:39:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1384121149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467429809] [2023-12-02 13:39:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:39:26,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:39:26,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:39:26,555 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:39:26,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 13:39:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:39:26,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 13:39:26,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:26,862 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:39:26,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:39:26,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-02 13:39:26,934 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:39:26,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2023-12-02 13:39:26,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-12-02 13:39:26,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:26,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:27,029 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1778 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (_ bv0 64) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1778) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|)))) is different from false [2023-12-02 13:39:27,041 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1778 (Array (_ BitVec 64) (_ BitVec 64)))) (not (= (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) v_ArrVal_1778) |c_ULTIMATE.start_create_~sll~0#1.base|) |c_ULTIMATE.start_create_~sll~0#1.offset|) (_ bv0 64)))) is different from false [2023-12-02 13:39:27,054 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:27,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-12-02 13:39:27,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:39:27,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 36 [2023-12-02 13:39:27,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-12-02 13:39:29,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467429809] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:39:29,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:39:29,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13] total 23 [2023-12-02 13:39:29,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777276912] [2023-12-02 13:39:29,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:39:29,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:39:29,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 13:39:29,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:39:29,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=614, Unknown=13, NotChecked=270, Total=992 [2023-12-02 13:39:29,358 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 23 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:39:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:39:30,629 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2023-12-02 13:39:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:39:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-12-02 13:39:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:39:30,631 INFO L225 Difference]: With dead ends: 109 [2023-12-02 13:39:30,631 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 13:39:30,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=141, Invalid=858, Unknown=13, NotChecked=320, Total=1332 [2023-12-02 13:39:30,632 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 18 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:39:30,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 495 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 13:39:30,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 13:39:30,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-12-02 13:39:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 92 states have (on average 1.3369565217391304) internal successors, (123), 103 states have internal predecessors, (123), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:39:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2023-12-02 13:39:30,635 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 29 [2023-12-02 13:39:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:39:30,636 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2023-12-02 13:39:30,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:39:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2023-12-02 13:39:30,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:39:30,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:39:30,636 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:39:30,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 13:39:30,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:31,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2023-12-02 13:39:31,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 13:39:31,237 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 13:39:31,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:39:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1162478973, now seen corresponding path program 2 times [2023-12-02 13:39:31,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 13:39:31,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897559954] [2023-12-02 13:39:31,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 13:39:31,238 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 13:39:31,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 13:39:31,239 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 13:39:31,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a28a9922-319f-46d5-b5e9-ef4fd162ecdc/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2023-12-02 13:39:31,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 13:39:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:39:31,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 13:39:31,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:39:31,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:39:31,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-02 13:39:31,747 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 13:39:31,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 13:39:31,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-12-02 13:39:31,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-02 13:39:32,120 INFO L349 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-12-02 13:39:32,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 58 [2023-12-02 13:39:32,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 25 [2023-12-02 13:39:32,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:39:32,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:39:50,811 WARN L293 SmtUtils]: Spent 10.59s on a formula simplification. DAG size of input: 185 DAG size of output: 142 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 13:39:50,812 INFO L349 Elim1Store]: treesize reduction 1386, result has 45.2 percent of original size [2023-12-02 13:39:50,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 3052 treesize of output 2791 [2023-12-02 13:39:51,286 INFO L224 Elim1Store]: Index analysis took 174 ms